Mugen is great in many areas but has flaws in many areas as well. I wouldn't personally say it was a 10/10 or 11/10 for the simple fact that Mugen usually isn't super polished to competing with real 2D fighters from the classic golden era or modern era. It could get there, but at the end of the day, Mugen should be treated like an actual game. It deserves that kind of respect and attention. There's so much potential. I've had some people tell me Mugen is not a game. Mugen is based on fighting games, therefore it can and should be treated like a real fighting game. There's a real split and divide between the fighting game community and the Mugen community.