i have been messing with that ExchangeNoPIN-v6.0 found in here
i am have a dev edition, rooted, on the 4.4.4 ota. i believe on 4.4.2 i had it working simply by flashing the zip on twrp but this was not the case with 4.4.4. i tried a bunch of different things by trial and error... eventually what i ended up doing the following get this to work (not sure which step was the key).
you have to make sure to clear data and cache in both email and exchange service apps first
i copied email.apk and exchange2.apk from the zip in the aforementioned thread into my phone.
interesting bit on 4.4.4 is that email.apk is in /system/priv-app and exchange2.apk is in /system/app
i took manually copied both apks into /system/app and /system/priv-app using root explorer, and set 0644 permissions for each, rebooted, didnt work, so then i simply manually installed both of them by clicking on the apks (from the original directory, before they were copied to the system folders). this installed them as an "update."
after I did this, everything was working.