Seems like the animation sex scenes are in the process of being optimized, since I assume the unoptimized scenes are live rendered, which would definitely be too much for mobile. The Katsue shower sex scene runs fine, so I'm guessing that the scenes are being switched to videos instead of live rendering for mobile.
tbf, making all of the abilities compatible with other things would make development take way longer, not to mention the time it would take to make new abilities and the like. It'd be cool if the dev(s) could pull it off, but it's just not practical.
