Pretty much what ppl forget is, ffxiv was told and announced that it was going to be less time consuming then ffxi. I used to play ffxi 2 hrs a day and sometimes that time is wasted due to aggro death and no one can help. Mostly due that i didn't see it or know it attacked. Like sand bats in valkrum dunes. Most bats before them didn't aggro. FFxi never kept the same rules on mobs. Some aggro'ed some didn't. And not every mob was an obviouse "aggro" mob. Or able to see. aka chigo(fleas) in caedvar mire. Those waste time so bad.

honestly how can you learn to avoid a mob if you don't see it.?