Quote Originally Posted by Memoe View Post
This!

But then again the world is horribly small and tight for an mmo (compared to GW2 for example). There's not much space for a random jumping puzzle in the map. Instances would work, sure but I don't think it would feel the same.

Put this ability to jump in use SE! I love myself a good jumping puzzle. Make them hard and rewarding. :3
I'm afaid instances are the only option, you already mentioned the space issue, and there's also a problem with the co-operation with another player. Just imagine a puzzle like in the portal game series where you have to work together with another player and now a third player comes and messes with your progression.