You cannot date Richard currently, but he will be added very soon.
The sketches are very old, from before Dyne had a background artist. The background artist (Gavelly) is making real backgrounds, and all the sketches, black, and gray screens should be replaced eventually.
The YCHs on Chester’s route are very old. As far as I know, no plans to fill them in are announced yet. In the past Dyne has had patron rewards and auctions, so it is possible a fan will get one later.
the main character’ Peepee gone
This is a problem on many routes–he seems to misplace his penis quite frequently. >_>
Many errors are fixed between the public and patron versions. There is an error reporting document, but it requires/recommends using the most recent version of the game, which currently only patrons get.