I was thinking about a few suggestions: -Quests (should range from the easy to hard difficulit level). The reward could be a custom weapon or armor.
-Merchanting area where people could come and sell their goods (we would need way more players for this)
-God Wars Dungeon (wouldn't trips with your friends be more fun?)
-Summoning and Construction I mentioned before would come in handy. (for e.g. house parties, creatures that would help you out in battle)
-The G.E. which would be located in the merchanting area.
If we had these suggestions brought into the game, we would surely had lots of more players available on the Learscape server. I agree that this would take a while to program, but these are just some of m suggestions; just to help you :D