On the contrary I find it pretty much alive. There's no correlation inbetween the amount of mushu rooms and the state of wushu, they're nothing alike. There even was a 200k tourney with a lot of people a couple of days ago, and using your wushubox mod snek !

Mushu is a fun "noob friendly" mod (new players generally like lots of dm and funny fights), if anything it familiarizes new players with low gravity & long tf and on the long term they might turn to wushu.