Yea, that'd be great. Anti-cheat developers. It would also be great to port Assist to a platform that's faster. Have a chance to rewrite the code and make things more efficient/user friendly as well as implement some new features. Just because something 'works' doesn't mean it can't be improved. Have a look at every piece of software around you.
I wouldn't disagree with your last statement, but I don't think improvements are crutial for the sutvival of the game. AC is. Usually improvments bring an endless ciycle of bugs/bugs fixing which hurts more than improves (imo).
Regarding what Ganja said, I think that the only way to increase the amount of permanent players is online marketing. Maybe you could allocate some of your budget (if there is something left there) on managing a display account in Adwords or maybe some other display network. I think it has the highest potential of bringing some old players.