What's funny is that SR7 has had to hold himself back a bit to keep the artwork still relatively cohesive. He's improved a lot more than most people have seen.
There will be more villainess content and likely some of it will occur in Lex's room. Every "completion update" is focused on a heroine but of course she's not the only one who sees content added - and villainess content is a possibility in each update. Also, the focus will shit as more heroines are completed and we're able to focus on expanding again - with new events, the main storyline, possibly adding new features, etc.