They've already stated that they know these are problems and are working on them >.>

We've known for months that the enmity calculations are being reworked. I agree that it's a little wonky right now but it's tolerable. However a system should be more than tolerable.

They're working on class uniqueness which would alleviate the feeling that all classes and weapon skills are basically the same thing. We've even heard a bit about how they plan to do about it in the Letters from the Producer.

Lowering the party size from 15 to 8 and rebalancing encounters to work with this will certainly help with battle time expectancy. Especially during NM fights, there will be less room for error and you can't just throw more healers/DPS at it.