I think you will find that most, if not all H game circles reuse their formula and just use different characters, and the formula normally plays on the fetish or group they sell to.
I think it's nice for the devs cause they can focus on what content they want to put into the game, deliver a finished product and not have empty promises unfulfilled when they release (like circle kame for instance). It also makes it easy to enjoy the content in the game (for people who understand japanese or dont) if it's similar to the previous works.
It would be great if they had more variety in costumes or situations but at the same time I cant say that they arn't exactly using most of the situations that can be applied to a fantasy RPG H game. the main thing about this circle as far as the games are concerned is corruption and prostitution, not really cosplay or costumes. there are not many circles that change up formula.
the latest blog post basically says
The new heroin's name is Maika.
the game will be played in 1 town and you explore the dungeon there (similar to Ima the milf).
some of the battles might be difficult or feel drawn out (in the current build of the game), but they plan to add mercenaries to add to your party.
they plan to show them off in the next update.
maybe one of them will be female.
side note: if you want to find the blog for most of the content makers it's easily found on either their main circle page next to the "ホームページ" section or often found on the "ホームページ" section when looking at any of their works