Hello,
I play as a MNK and i am getting really annoyed when it comes to the positionals.
The idea is nice, but in the end is really broken. Not to mention about the soloing when your damage is heavily reduced.
Yesterday i did the Titan EX, it was the first time that i got really annoyed about this mechanic. My rotation need to be on the flank when the next phase were plums, and i had to go back to join my teammates losing a lot of DPS. AOE to the side when i have to hit the side and again DPS lose. People says that MNK is the highest single target DPS, well i wonder how many positional do you guys miss when you cannot position yourself properly because of the mechanics?
The other thing is that bosses turns instantly 180 degrees to aim at random and again you miss positional.

Right now i am not really sure, i would love to hear some tips about it, it doesn't matter that i can hit the dummy for 500dps, when i cannot execute it on the bosses because of aoes, mechanics, insta turns.