There is one really bad area in the first zone, can't remember exactly what it is called ('Something' Quarry), basically you need to go into the quarry and rescue 8 miners and kill 12 mobs. Sounds easy but the mobs constantly respawn and each toon must individually rescue 8 miners.

I ran my 5 guys around that shitty quarry for 30mins finishing that awful awful miner quest, immediately logging off the game because I was so mad. Did I mention the mobs daze you if you try to ignore them? So my team would become spread out through the mine making the quest even more fun!

And have I been spoiled by flying mounts or is there an absolute ton of art assets to get your team stuck on as you go around?

Bitching aside the first zone is beautiful and I'm logging back into to play now, now way am I leveling a second team without flight though.