"We want jobs to be different!"
Jobs are minimally different.
"We want jobs to be the same!"

If DRK can't heal as much, it should deal more damage, that's it. I don't get why people act like kids throwing a tantrum. "I can't heal myself, so you shouldn't either!"
And about having more rezz for tanks instead of heals, we have seen how well that has gone for SMN and RDM, licking the dps floors for ages because they have so much utility.