the good thing is the game plays and feels exactly the same as before which is nice to do.
the graphics look good. but the fps are really not that good.
i saw in the last beta tests already that there has to be some crazy bottleneck somewhere in the code.
There are performance analysis tools from both nvidia and AMD to analyse this and fix it.
The AMD one is even open source.
Also the performance on AMD GPUs seems alot worse than on nvidia GPUs which probably means there is no optimization in that direction at all.
But there were alot of gametitles in the past that ran really great on both GPU vendors when the game was optimized for AMD Graphics cards.
You should look into it.
If the performance is fixed i think there is nothing standing in the way of release