Have you not noticed that Three Rings is listening to us?
Bring your problems up in the forums.
Give detailed reasons why you like or don't like things.
If you already see a thread about a problem, reply to it. Making the 30th thread about hating the new trade chat isn't helping.
Also, there is a sub forum for talking about things like fixing the trade channel. (http://forums.spiralknights.com/en/forum/7) I think your voices are going to be heard more easily there, as the whole point of it is to communicate with us.
That's what I've been doing.