The dance-style combat is broken for me. I've been hit by an AOE from across the room.

No, I DON'T have a great computer. But if the game runs on it I should be able to play.
The thing that gets me is there is no other option. I can't say, "This part is an issue for me, so I'll change to a different job and still get to contribute." In FFXI, I could stay off the front lines as WHM and I could throw up Stoneskin and Blink.
In FFXIV you dance or die. There is no job I can play where I can avoid this glaring issue, and it's not like FFXI where something goes wrong but I can hold out. These things are often insta-kill situations.
The first dungeons were so much fun where using my actual class abilities could get us out of a bind. The further end-game it gets the more it gets to all look alike. "Dodge the skills or you die, the game".
I want my job abilities to be what makes the difference, not whether I can afford hundreds of dollars in upgrades for my computer.