1.Some TVs have issues with the 2.2 HDCP.(switching to 1.4 fixes these issues in most cases)
2.Overheating? This is NOT true.I play mine for 4-8 hrs without any issues.
3.It's quiet.The fan works fine on Pro.
4.Some fps drops occur on old games with poor patches for Pro.
Those games are not well optimised for pro.
I play BF1 & WoT in 4K they look awesome.& i keep switching between 1080p & 4K.
BF1 plays in 60fps.
Overall,pro has no issues besides compatibility with some TVs.(HDMI ports,HDCP etc)
Some TV brands say that they will update their TVs to solve those issues.