This is where I don't like too much custom stuff.
The MA should be nueteral as far as objects go IMO. When Waffle Joined he made everything ETO style. Which looks good, but is not convenient for people working on a PTO terrain. Pine trees in the Pacific Jungles looks out of place and I had to replace them, making the terrain 30mb+
With skins submitted online, there is can be a download in-game to view these skins. With new objects, terrains have to be rebuilt, re-downloaded by all players, new TE and OE released, etc.