I feel Spiral Knights needs more long-term goals.
When you play SK now, you can only really enjoy yourself if you have enough energy.
And the only goal when fighting is to get more money for better equipment.

I think SK should offer other things as well.
I'd really like to be able to buy a house and furniture.
A small or a big house, it doesn't matter, just a private place where you can hang out with your friends, so I can concentrate on other things too than just fighting.
It'd be similar to the way housing is in Yohoho! Puzzle Pirates.