I don't often (ever) write comments on blogs like this. However not making AU2 is going to be a real issue for your company, and I'd encourage you to reconsider for the following reasons (business related):
1) No active revenue stream. While the $5 for download + the fees for costumes is probably more than you anticipated initially, it is not long term cash that will keep your business afloat. without thinking 18+ months away, you're being short-sighted (I'd even urge you to consider 36 months+)
2) the novelty of the game (the boom you're experiencing) will wear off (unfortunately; just the norm for business). it's not a knock to the game, as I personally really enjoy it, but it's currently a fad that you need to build out instead of squeeze to death (see #3)
3) the changes you're talking about making will not solve #1 or #2; instead, they are patchwork to draw out the novelty of the game. this game is not polished (and that's part of the charm) but for a larger success you will need to re-build. re-building does not open up any new revenue streams (maybe a small percentage if you charge for maps) to keep you going.
I like the changes you're thinking about, but there doesn't seem to be a strategy behind the why, how and at what cost (short or more importantly, long-term). Among Us 2 could be a huge success if done correctly, and putting all your eggs in an already full basket will just cause some of them to fall out and break.