Refreshing the entire Achievement system would be nice.

Make it flashy and dank.
Reset it for all users.
Remove special achievements, make everything accecible for everyone.
Make it harder, and more flashy.
Achievement tabs ingame?

When it comes to tc
Do what every other game that tries to keep a stable economy does every year..
Cut the money in half, just simply delete 50% of all the tc in the game.
Delete 50% from every user.. Problem solved.. And noboddy has any reason to complain about it.