I guess UHD just don't work well with my phone. I had changed to CM and now running great. Well a bit battery hogging but battery life still much better than UHD. Heating is usual but much less compared to UHD and phone is always set to performance mode. All the problems I described before on UHD rom is gone.

I think the only downside of CM is the storage space. Now phone is running on base apps like whatsapp, waze, messenger, COC, viber and can't install anything more lol.

Besides, the best benefit of changing to CM is probably making me to decide to bear with this phone for longer period lol. Looking forward for next Sony flagship (Well they say only 1 flagship for year 2015).

My final ROM, i guess.. is a Xperia Honami. Went back for the Cybershot Camera as really can't stand the quality of CM roms. But the smoothness on ICS is a trade off, kitkat roms are actually much smoother.

Anyway had finally moved on to another phone... got a used Z1 instead of getting a Z5 prem although its really tempting haha.

Btw although the battery is draining fast, however the battery does not bulge or whatsoever as compared to my friends original sammy batteries, which at this point of lifetime, 3.5years will probably bulge or something. I guess Sony did not cut out budget on battery + my usage on this phone is kinda extreme haha.

Well I guess the pro series will be as vehicle dashcam for now as second hand market for this phone is basically dead...