If it were possible, I would love a system like The Legend of Zelda. Not just for jumping, but for climbing as well. Incorporating a system like this depends on how polymorphic the game's code is, so I don't think it's going to happen.

Now here's the thing, I hate it when people randomly jump for no reason. It is immersion breaking. HOWEVER, if jumping were to be added to the game it should NOT be limited by a cooldown of sorts. If there's one thing I hate more than people jumping for no reason, it's a stupid limitation put into place because of a stupid personal preference. Yes, I am calling my hatred for people jumping for no reason stupid. Plus, a cooldown won't fix it. Some of you don't realize it, but it's not the bunny hopping you hate. It's the fact that people will jump for no reason. So even if people could jump once every 5 minutes, seeing different people pop up amongst the crowd in the adventurer's guild is still going to annoy you.