I'm excited for flying mount updrafts and adventures but a little worried that mounting in combat will be awkward for the game.

There must be some new reason they want us to be able to get on a flying mount in combat but it's odd that this doesn't extend to other mounts and I also wonder if it will remove flavor from other parts of the game by making the choice to get into combat a bit more trivial. I'm just not sure about that one until I get my hands on it.

Right now if you choose to solo a champ or low man a group event there can be a trade off by choosing to disengage. That's totally gone if you can decide to fly away whenever you want.