Well, as I have just posted over at XDA, I have had a problem with Neatrom AOSP 4.4.2 V2.3. I used ART and everything was fine apart from a couple of small things. Volume was quieter, even after flashing a mod, plus I had one app not working - droidstats. The phone ran really well and was very quick. Really snappy. Fantastic.
Last night I left the wifi on, and one app did auto-update over the wifi. Anyway I switched the wifi off and guess what. No 3G. Got 2G OK, no H or H+ shown by the signal strength vars. Nothing. Apps such as Facebook reporting no internet connection. No problem I thought, probably just needs a reboot. SO I rebooted the phone, twice and it just stopped on the Neatrom animation. After 25 minutes of trying I thought something must be corrupt so I reflashed the ROM. Still no good. So I have just gone back to Aroma V5.6. Phone is now back up and running, and I am currently putting all my apps back on.
Not sure if Sale or any others will find this of help. Can't even remember what app updated as I didn't really pay much attention at the time.