I kinda half-expect (and very much hope) to see Prism references because he's been punished enough.
I'm gonna go out on a limb here and say the nonstop degrading and referencing of prism and the sketching scandal just doesn't happen in Japanese circles and doesn't seem to hinder Shou's work. Shou hasn't stopped publishing by any means and it seems much more likely that Shou uses a different pen name to distance themself from the very graphic, intense loli porn and sci fi epic they've been doing.
This.
I think the users in this page give the whole tracing incident a lot more importante than the actual japanese readers (not that it isn't important). The name seems to simply be a way of trying to distance he's hardcore pornography from he's fluffy fun safe for work manga.
If so then I would say it's a pretty smart move, first impressions are important and having your name be associated with a certain type of content can be very harmful to the stuff you want to put out. I saw Shou's NSFW works before he's SFW ones and it was really quite hard for me to read the latter without feeling a little bit weirded out. However with cool kyoushinja I read his non H works before even knowing of his NSFW works' existence, so I never made the conection in the first place.
Presenting himself with a different pen name is a good way of dissociating he's two (very) different types of work. Even if readers eventually find out about the other content he makes, they will have likely already formed an image of the type of manga they expect from him.