His Zeta gives him turn meter every time a clone ally takes damage. It's useful in Territory Wars and HAAT, but that's really the only place you're going to conceivably use a clone team. I would NOT use Fives under a Kenobi lead, because that gives taunt to Fives whenever he uses his special ability, Combined Fire. If he's taunting, other clones aren't taking damage, and his Zeta won't be triggered. The good news is that there are still plenty of clones that haven't been added to the game yet, so it's possible clones could be improved at some point in the future.