Dang, I'm actually surprised that there's a topic for this game on SMWC
I'll add in my two cents since I've been playing a lot more fighting games lately.
From what I've played, Kobuto V seems to be a pretty unique fighting game. I think the most similar game I've played to it is ARMS, but Kobuto is interesting in that the gameplay actually involves becoming proficient at using and dodging danmaku (unlike what I've seen with the official fighting games), since you can't block unless you're at a melee attack range.
I usually play fighting games for multiplayer, but in my opinion, the single player is much more fun than those of other fighting games I've played because it feels like I'm playing Touhou, while also being a fighting game with a nice arsenal of moves. (Though, should note that Kobuto V's characters are currently all from EoSD, with the exception of Koishi Komeiji who is DLC for 50 cents USD. The developers mentioned adding in future character DLCs if there's enough interest for the game.)
But online reviews seem to view the game much more negatively than I do. I think a part of that is because the game seems to have been released on PS4 without English instructions on how to play, and the game doesn't really indicate how to use most of the moves at all otherwise without something like a manual (that comes with the Switch version). And it's also evident from gameplay footage and reviews that the average PS4 player probably doesn't know how to do most of the moves (so they basically just use the 3 moves that are directly mapped to buttons) as a result :\ and I think a lot of bad reviews and complaints about the gameplay being dull and repetitive (or sometimes confusing) have come from these PS4 players.
So I would say that, based on the gameplay, Kobuto V is significantly better than what review ratings online might currently suggest, at least as long as you learn the game's controls first. But note that I don't really judge games based on graphics. (If I did, I would have stopped playing SMW hacks quite a while ago, lol.)