I think it would be super cool if the Devs would create some EPic puzzles/challenges/quests. They would require many people to work together in order to solve/complete them. sort of like building a new street on the map, but with a different goal. For example, I'm assuming that you are going to be doing more with the rooks, or ravens or whatever. Maybe make a quest for everybody in the game as follows:
Danger! Rooks are invading Groddle Forest, everybody work together to build a wall or magic shield or something. If players fail, the groddle forest gets whiped out, and people lose a bunch of items, or all the trees die or something!
I think it would spice things up!