Thanks guys for all your feedback. I have sold my Coolpad and now use Redmi Note - so MIUI works flawlessly ;-). There is one person on telchina.pl forum, that wants to continue supporting MIUI, co keep your fingers crossed. I'll try to guide him and maybe MIUI for F1 would be still alive.
Nikillin seems good at first, but after a month of heavy use it just didn't work well. It does not tightly fit the phone, and it gets dirty underneath, even small things like sand can get under and scratch your phone. Now I am using just silicon case I got with it and waiting for IMAK (transparent) one to check it out.
Unfortunatley, bitbucket.org is down - Italian translation was hosted there... I do not have it backed on my HDD, as during multilanguage processing it consumes more than 2GB of space... When it is up and running again I will post update.
I decided to stay with the Coolpad... better chinese support, and 5' just fits me better, but it is a matter of personal taste. Jiayu has some things that are better though, but for me GPS performance is way better on Coolpad and I decided to stay with it.
I change whole firmware folder - it had newer and bigger files for "W" version. But I dont know if it is really necessary.
No, I use stock libs. The difference is more in Camera APK than in libs alone. When I was using Cinema FV-5 on older version with stock libs, and used MP4 recording with 1080p and 30mbs I got exceptionally good videos. But it is a paid app. I'm in the process of hacking smali files of stock MIUI camera app to try to make it use MP4 and good quality but it is a painfull and slow process... and time is a scare commodity for me nowadays...
Yeah, this phone has exceptional GPS for a budget smartphone, even just for a smartphone. I never had a device (I had also some standalone TomToms and others) that was so quick in establishing a fix, and never lost it. Endomondo runs great here also.
@dakok - my last ROM should work on both WCDMA and TD-SCDMA versions (I cannot check TD-SCDMA version though because I dont have one).
There is a password if you would like to unpack ROM with ZIP on the computer. What puzzles me, is that in CWM it installs fine! But Camera APK would not install on other ROMs... something is missing, or Coolpad requires some kind of framework for it to run.