DRG is simple enough. The beta forum complaint people had was to make the more complex because they're too easy, and SE straight up said no because they're intentionally designed to be simple.

Melee is meant to have positional requirements and it's balanced around it. I don't melee too much, but my melee friends have no complaints about it (my MNK friend only complains about bosses like Titan that jump and cause a loss of greased lightning).