I'm playing Glitch now for a few weeks and I seem to have arrived the mid-glitch-crisis. A short summary of what I think.
Items
You can get almost all items at vendors for a cheap price. This is good for newbies, but also not very helpful if you want to sell self-tinkered items at the auctions.
Quests
Man, quests! Not enough of 'em. Quests only seem to be available after you've learned a new skill, and except very few quests like the ghost- or the "Something Loam" quest they're mastered pretty easily.
Economy
Call me a whiner. Sure you'll do, don't bother to answer then. But since almost everything's available pre-made at vendors I don't see a real point in making something myself. The market is completly irrational. It's better for me to sell the individual resources than selling the goods I made with the Tinkering Tool, using my valuable energy points.
Possible Improvements
Make everything user-tinkerable.
All items available at vendors should be made by users.
Couple the auction-market with the vendors, like: "If I accept the default selling price, my item get's transfered to a vendor - else, it goes to the auction." (I'm pretty sure this can be improved, but a lot of MMORPGs get it right)
Maybe make local auctions: Auctions are local to the hub where you created the auction. Maybe create obstacles which restrict the "Mileage" - the maximum distance of visibility of your auction - to a skill level? Like "bulk selling" - if you have level 1, your auction is only visible at the hub you created the auction. "Bulk Selling 3" - Visible up to three hubs away form the place you created it.
Moar quests!
More street projects! At the moment everybody is hoarding blocks. I have so many blocks, I stoped counting them. So if you create a new street project there will be so many people like me throwing in their gazillion pieces of blocks. Le Sigh!
For your consideration...