given the new game over animations look smoother to me than the previous ones, that's an upgrade if AI was used.
But honestly, I don't get what some people expect given they've made the same sort of gameplay over and over with some additions between each one. At this point you're playing for the scenes.
gameplay wasn't that much of an upgrade since the 3rd one in the series (the 2nd sakura game). all you get this time is an extra upgrade system for your stats, which never was needed cause the enemies are still piss easy to beat.
Also, at least you can make the scene gathering a little easier with the y, u, i, and some other keys to manipulate HP and knockdowns. This has also been a thing in many previous games too. and until the official release, everything is uncensored anyway. it only gets censored due to JP laws.
this isn't really defending Umai Neko since it feels like shovelware on top of decent art regardless, but expecting something new or even challenging is also pointless by now so... can take it or leave it i guess