Mats are dropping in value exponentially on a weekly basis, meaning there's less and less incentive to actually play the game save for gaining heat. But what do you do when you've got everything leveled to 10? Nothing. There's nothing to do at this moment. One major reason for this is because there's only like two item drops... pendants and the quicksilver set, one of which is incredibly rare.
What you need to do is make more unique items that drop. This will give players incentive to play more and spend a lot of CE (give you $$$) to buy these rare items. Maybe give them variants as well, just to add to the cost so people buy more CE.
Besides that, more levels, monsters, etc., but we already know that's in the works. In the meantime a little stop-gap like that would really help with the monotony. Yeah, the game is lots of fun but we need more incentive.
Also need more things to spend CE on. What am I gonna do with all this CE/CR besides buy some ridiculously rare UV? Give us Guild Hall decorations, maybe some gambling mini-games like a card game or something, maybe some more customization options, whatever. You could make them all cost CE for all I care.