It would be great to have, at the very least, a LOCKED 30 fps. I am sure this is totally possible for a PS4 Pro to do for this game. But patches cost money, so I'm not really sure it is even a priority for Techland.
I bought the game prior to getting a PS4 Pro and held off playing it due to this frame skip issue. Now playing it on a Pro, I was very disappointed that boost mode did really nothing for the game performance.
Games with inconsistent framerates I get nauseous while playing. So while I do really wish to play this game on my PS4 Pro, it looks like I'll keep waiting. Shame too since it seems they still support the game with free content.