Unfortunately, I don't think I can help with these things. There is no 4k variant or higher resolution plan. As for the decline in quality, I am not sure why that would be either.
However, I do believe Ezra has some repeatable encounters. If you haven't seen them then there is more story for you to go through :D
Ok thanks for the reply.
As far as the quality issue: I was talking about the adult scenes. You have great looking characters in some scenes then in others they look low quality. That is what I mean there.
I have been playing for many hours and thought I was all done the game. I'll get back in and see if I missed anything. Peace.