TL;DR: Mod for stock 4.4 is not forcing tablet UI, but the reboot menu options work
So I could not get lparcshinoda's 4.4 deodexed ROM (the only one that's currently available for the Nexus 7) to install. Instead, I grabbed the factory KRT16S image, rooted it, and deodexed the /system/app, /system/framework/ and /system/priv-app/ folders. I also zipaligned the apks I'd deodexed.
I used this as a test to install the mod that just does tablet UI and also the mod that does tablet UI + the power menu for 4.4 stock. The wallpaper changed, but the notification shade was still at the top of the screen,
I did not get tablet mode for settings, but I did get tablet mode in Gmail and in the Play Store. The size of the home screens was bigger than what could be displayed on the screen (left and rightmost icons were partially off screen). The clock and other icons at the top of the screen were too big by a little. The home, recents and back buttons were the only thing at the bottom of the screen.
The revert flash worked fine.
Thanks again for working on this!!