So a few nitpicks.
Instancing is almost too much imo. So many times you will literally click on a object(door/npc etc) to zone, run for 5 seconds and do it again. One glaringly obvious situation was the airship quest to visit the other 2 cities. Getting off in one of the cities(think it was Limsa(sp?). You get off the airship(btw leaving/arriving 2 separate cut-scenes you have to go through) , walk about 10 steps and you can see the NPC you are supposed to talk to standing on the other side of the gate/turnstyle. Well you cant just run over there , its blocked off. You have to talk to the "Arriving" NPC to get him to teleport you literally 2 feet(and load time). When you finish that(btw this is 3 load times already once boarding the airship(which is a object/instance also), you have to take a lift down to the area proper(another talk to npc and have them teleport you). So from start(First city) to finally in the 2nd city, you click and load 5 times.
Other major pain and hopefully its a bug, is the quest where you enter little "Battles". It seems only one(or a few) of the instances of that "battle" can be going on at once. So you have literally 15+ people(if not more, during primetime) all standing around trying to spam to get in or I even saw at one location there was a literal LINE formed to start the instance that had about 25 people waiting.