So far, it looks like nin may have some complexity in the way they execute some of their abilities. I would like to see more of that in classes

I would especially like to see more buff/debuff heavy classes and jobs..

Teleporting should be limited to hubs, in the expansion zones.

I would like to see more elites around that can trounce players if they aren't careful, making you have to pay attention, when you travel

I would like to see open world areas that are meant for 4man groups or more.