You are right! I still still have to work with our product and engineering team to schedule the work to fix these, but that is going to be easier for me to champion once each issue is clear enough to work on (having steps to reproduce internally, samples, etc makes this possible).
As for this issue of HFR 60fps content, This is not something that we currently support (Can not play HFR Movies on Apple TV - #2 by DaveBinM). It is known and has some technical challenges with our current MPV player (as @Achilles touched on). I don’t have any timeline on this being added, but will ask if there is more details to share.