I realize that this kind of feature request doesn't have the glimmering sparkle of some more interesting graphic optimizations (which by the way, great job implementing SAO/etc!) .. however..
There's really a HEAVY need for better asset management within the game guru interface. That slidebar on the left becomes practically useless after 5-10 items and the add new items dialogue can get kind of insane if you have a ton of freebie/paid assets as I do.
Things I'd like to see:
1) A project/level based asset list which has a tree structure. Even something as simple as:
Wall/building components
Furniture/Scenery Items
Pickable items
Characters
Custom Asset Group Names
2) A find feature. As of current the best workaround is an explorer window and a bookmark which I then search. I'd still rather have a simple search integrated into GG so I could find instances of items more easily.
3) Meta tags - see feature 2. This would help with searching.
4) A way to DELETE items from the asset list. As of current the only method I know of to delete an item and it's subsequent related items inside of game guru (hey, sometimes things are just obsolete, a bad fit, or a bad choice) is to outright reload an earlier save or delete the whole level entirely. Otherwise you're wasting valuable real GUI estate (and possibly game resources, not sure how it handles that) on an object you may never use.
5) A way to select all items based off of the asset list. Example. You have 350 'Rock1' models in your level. However, you'd like to move them or get an idea of where they are. You Right click on the left side's Rock1 model and choose 'select all'. They all highlight, allowing you to clearly see where items are positioned.
I'm not asking for some crazy interface juju here. I like the essence of Game Guru's simple style. I just find that the asset management makes things crazy difficult to work with.