Need more content and/or item drops...
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.

As far as I know, pretty much any item can drop from treasure boxes, albeit with an incredibly low probability. If you're looking for something to do with crowns and materials... why not craft more armors, and experiment with different strategies/ playstyles?
I have a better idea; donate to me.
I agree completely. The amount of equipment int his game is... saddening.
Even UVs are a questionable investment there isn't a NEED for them is more of a efficiency thing.
My guess is that Three Rings, didn't expect people to plow through all the content in such a short time, so we're probably screwed for a good while.
I have another idea; move this thread to the Suggestions forum.
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.
I stopped reading here (actually no, I didn't, but the rest of the post makes just as much sense as the above). I don't understand your reasons for playing. Mine are completely different. Seems you like trading more than exploring the clockworks (read: battling monsters). If that is the case, this might not be the best game for you.

If you have done everything already and have all the recipes and gear up to level 10 you could always contribute to the wiki. There's a lot of pages missing images or information in general that you could add to.
~Gwen
The game is fun enough as is. While I would like more variety (and I'm sure the developers agree) -- I really don't want to see artificially extending game life with rare drops. They don't affect the actual gameplay value, and only serve to encourage the "games as work" players to persist. (I'll admit there is a small segment of players for whom a collection element adds gameplay value, but I think that's better served with more variety and less with rare drops.)
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.