Just a couple ideas I have.
One thing I noticed while playing was there was really no need or want or even a hint at trinkets as far as I've seen or come across. This is mainly because it is what I consider a "Premium" Item for the game. I just feel in order to give it some limelight basically an interest and pourpose is that we should at least get one free permanent trinket slot.
In addition I just read Vertigo153's guild ideas post and thought that most of his ideas are valid and really what I had expected when I entered my guild hall and alls I had payed for was an extended friends list and a crafting machine.
http://forums.spiralknights.com/en/node/15207
^---And that is the link to Vertigo's guild post fo anyone interested.
I have no idea how that adding 1 free trinket slot would ruin the game, expecially since they are so expensive/extremely hard to acquire. But would add a NEW free trinket slot? Or open one of the locked ones for free?
P.S. Name you posts so that its linked more clearly to your content i.e. naiming it 'Trinket ideas' or something along the lines would make more people view the post than all of the other 'general idea' post scattered around the forum. I only came here since I'm looking into each post and seeing what it is about.