This is a much smaller project than SS. Dark Cookie can throw about around money each month than this project gets in a year. Basically, it’s one dev who is paying a single (not very good) coder to help on the side.
As such, expect everything to be much less polished. As in, every update has a bunch of bugs, storylines at some point just stop, the last parts of many storylines often exist only as line-art…
Taking that into consideration, I consider the development speed comparatively faster, but in absolute terms slower. I recommend playing what is there (personally, I played as far as there was art drawn for the scenes) and then waiting at least half a year before returning. If you want faster updates, support the developer on Patreon. Each additional Dollar will have much more impact for a small developer than for a big cat like the Summertime Saga project.
Regarding the fetishes mentioned in the OP:
>2DCG, Animated, Incest, Milf, Exhibitionism, Voyeurism, Seduction, Lesbian, Freeuse, Oral Sex, Vaginal Sex, Anal Sex, Titfuck, Group Sex, Male Protagonist, Lactation, Mobile game, School setting
The only ones I don’t recall are lactation and maybe group sex, depending on whether watching a gang bang counts. However, several of them only happen in the parallel world, which is nearly non-existent at the moment. As in, you get on one chance to walk around and look at a bunch of stuff which you cannot interact with before being booted back into the normal world.