I would suggest for testing purposes, that you go back to the original ME FW you were using before you updated it, which would be the one in 3802 BIOS - unless you were using older BIOS too before you updated ME FW recently??
Then, once you confirm if issue is same, or gone, you can then decide what you want to update too. Did they come to a conclusion on that other thread, which is best updated one but not one with issues?

I have managed to downgrade thanks to someone in private message. and now instead of having from before ME FW 11.8 + ME FITC 11.0 i have ME FITC version 11.6 (and fw 11.6 too), strange. static audio sound is unchanged but the whole system is a LOT faster, incredible. didn't tried games yet.

The bios version 0401 had unlocked ME read and write. i used usb flashback to flash it, still had me fw 11.8, then i tried to use the tool under windows but still refused. i then tried to flash bios 3802 with usb flashback and it worked!

edit: yea games are clearly more fluid, fps seem much more stable, no microfreeze yet even if they didn't happen very frequently before, i didn't tested long enough.