Well, A couple things I could suggest.
Don't worry so much about the Trademarked Logos and Brands. The work around to those is just do not ask for money when/if you distribute them, and wherever possible make a note on the asset that logos are copyrighted to their respective owners, and you should be fine.
The second thing is that, this game is just starting to approach "A fair amount" of small-townish assets, at least american. Enough we have variety anyway. What we're really missing is Mid Size town > Mid Size City assets. There are TONS of Wooden Buildings notably. 1-2 Story buildings in general. What we're missing are 2-5 Story Buildings and Warehouses of all descriptions, Modern and Dated. Brick and Mortar stuff, Aluminum/Concrete Prefab, Concrete Raised, Early 20th Century, mid 20th Century, Late 20th Century, we just do not have barely any...... We some, but not enough. So I'm always trying to encourage more buildings out of creators, lol. Even if you're reskinning Tume's or DMDrake's 2D series buildings, ya know? lol. Ideally it'd be nice to get more modern 3D + Decent Textures stuff, but I'll take whatever I can get as long as it looks decent.
One piece of advice though if you do start doing buildings. Pay VERY close attention to Scale. There are more horribly off buildings Scale wise then I care to think about much less mention. Once you think your done bring it into the game and drop a Neoklai person next to it, a YZ Truck, and a JR Diesel on Tracks to compare, this is litterally the same test I use since these are very common assets. If the person can't even reach the windows on the first floor and the Locomotive could easily squeeze through the front door, its too big. If the Person has to crouch to get through the front Door and you can see the roof of the Locomotive from the other side of the building (over the top), its too small...... We don't need perfection, you don't need to measure to millimeter. Just approximate is fine, but please, *approximate* it, lol.
-Falcus