Latest update: 11082014 2.30pm EST
Thank you bonuzzz and Valera1978. This OmniROM directly built from source is out of the box the smoothest and reactive ROM I've seen on the T-900. I have been fortunate to run this version in alpha and beta over the past 4 or 5 days and I have not seen any extraordinary issues with the release.
Note for v.2 -
Be very patient in flashing v2, from that system format starts in TWRP until extraction kicks in there's currently a delay of up to 3 minutes
Just as under the SM-P900 cm11 tread, I have performed some functionality testing of the device and some extra features, they are shown below as
working,
not working or
not tested. The functionality grid was developed based on weaknesses in earlier AOSP builds and ports for the large format Samsung Tab/Note Pro family:
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mtp -
to activate go to Settings/About tablet/ and tap 8 times on Build number - The menu will now have Settings/{ } Developer options/ activated. Check mark USB debugging notify.
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adb
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External SD - working out of the box
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Ext4 SD card mounting on external SD - Auto-mount does not work, tested on Sandisk 128Gb SD
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USB OTG including USB storage
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Off-mode charging
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Encryption tested on backup restore in TWRP 2.8.1.1 restore failed in data, but must be related to a TWRP error Encryption process in ROM takes about an hour to perform, if someone is interested in performing the test and report back it would be great, but theoretically it should work.
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Lid sensor
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IR blaster - worked by using
IR 2.0
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OC settings -
located in Settings/Performance/ if you click the 3 dots in upper right corner you can chose a toggle, or a drawer mode where a multitude of performance settings and information is available, most of them are currently not used.
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Advanced reboot -
to activate go to Settings/About tablet/ and tap 8 times on Build number - The menu will now have Settings/{ } Developer options/. Check mark Advanced reboot.
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Screen rotation specific issue with
T-900
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Play Store
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Google Play movies download and playback
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Google Play streaming Movies & TV
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DRM -
tested with Audible, Google Books and Amazon Kindle
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Zona
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Popcorn Time -
need upgrade to latest version 2.3 beta, includes built-in VPN and Chromecast support with subtitles, earlier version timed out
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YouTube 1080p playback -
1440p will work w.
v5.9.0.12, but I believe this to be a false positive.
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Netflix
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Chromecast with
#MirrorEnabler hack,
allowing for screen cast
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MHL connector
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Miracast
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Capacitive lights -
I assume this is the backlights for the capacitive buttons
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Capacitive keys
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Home button -
correct function performed
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Brightness manual + auto
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Vibrator
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S-Pen according to OP only available on P-900
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GPS lock and voice directed navigation
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WiFi both 2.4 GHz & 5 GHz are working
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Bluetooth
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Microphone
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Audio on both speakers
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Headphones
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Camera - in progress; the camera "works", but does not allow for single shots to be taken, and crashes in video mode, but
panorama shots are working

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Torch as of v2
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Camera Sensors as of v2
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Xposed Framework and modules -
need re-initialization after each boot (common to all AOSP ROM's)
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Superuser - installation of latest flashable version
SuperSU through TWRP is recommended -
make sure to enter into SuperSU settings and execute "Install SuperSU backup script" under the CUSTOM ROM label before re-flashing a ROM update.
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Hangouts Dialer phone calls via Hangouts
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The following are standard limitations and options for OmniROM:
Write access to your external SD-card works out of the box, but just in case i suggest to d/l JRummy's
SD KitKat Fixer
init.d support also works out of the box, otherwise d/l
Uni-init by Ryuinferno.
If you think to much heat is building up use Performance/Governor set to ondemand, or conservative and I/O Schedduler to bfq, in addition to increase battery time you can set Wi-Fi/Advanced/Keep Wi-Fi on during sleep/ to Only when plugged in and make sure the Wi-Fi/Advanced/Wi-Fi optimization/ is checked and reduce Display/Sleep/ to below 1 minute. You can also use some apps to improve battery eg
Easy Battery Saver, or the more sophisticated
AutoCon+ Save Battery & Data and and to put hanging apps to hibernation
Greenify that I believe require
Xposed Installer. To improve charging time, you can use an app eg
Faster Charger. Finally, I have also used
PurePerformances in order to further improve the performances and
VIPER4AndroidFX to allow for louder speaker sound and enhanced listening experience.