Hey guys, let's give melee all these positional only attacks and have buffs/debuffs that if they drop off, they do terrible damage. Oh let's also make all the fights require lots of movement from melee. Wait, another great idea. Let's make it so you have to attack from the front only and can never use any positional attacks. Brilliant!

It really does feel like the devs who design the fights never talk to the devs who design the classes and that neither group plays the game. It really is unfortunate that melee classes are a liability on a number of fights and in the few fights where they should "shine", a ranged can do nearly as much DPS so why bother?