It's simple, either provide a locked 30fps at 4k or provide a 1080p 30fps like what is achievable on PS4 Pro.
I'd suggest 1080p 60fps but to be honest, given the state of the game at the moment, pretty much everyone has come to realise it's pie in the sky.
I spent £70 on the Legion of Dawn edition for xbox expecting a locked 30fps experience as discussed by Mike Gamble on Twitter, this never materialised.
So, I bought the standard edition on PS4 Pro so that I could experience the game (as I believe) it was intended to be played, at a solid 30fps.
I'm not asking for a refund, Im just asking that you step up and provide parity in performance between all platforms.