For one, almost every KG (uchiha included) is going to be getting updates, so although I can't give any kind of time estimate you can still expect changes for the better eventually.
Secondly, you're ignoring the fact tsukuyomi gets stronger as you get more uchiha resets, AND as you get more oro kills. Add on top of that the fact it also mostly stuns the current target, as well as the fact it doesn't really have an upper limit to its damage unlike tsubame, it becomes far superior overall.