I'd prefer Skillchains make a comeback, but I don't hate the combo system. I don't have enough endgame experience to comment on their overall usefulness, but in theory, I like the combo system. Like most things, I'm sure the implementation could be improved, but the framework is there to make a decent system.
Now combos + skillchains that actually made you think, plan, and work with other melee to maximize dps. That's something I could get behind.