I can't argue with that kind of logic
There really is nothing more to do. I keep checking in from time to time because every once in a while, we stumble across someone who has bought the game for the first time, and it's fun (for me anyway) to answer their questions about quests, strategies etc.
LEC has just released a Lucasarts Archives version of TPM in a white box (for $15!) so people may start checking in asking again.
As far as future mods etc, there really won't be any. The mace.baf model is entertaining for all of about 10 minutes. The Darth Maul model is NOWHERE NEAR being finished, and I don't have time to work on it, especially since I am 99.5% certain that LEC wouldn't allow either of the models' release. Not to mention that I just found the multiplayer mod (LAN-only, no working lightsabers) that will NEVER see the light of day because it's so friggin' buggy.
All in all, I can completely understand the feeling that it's time to move on.