If the cards were the main part of it's healing kit then the RNG'd be a problem but that sure wasn't the case and still isn't. Folks who didn't like it were basically asking for it to be a different job.

I feel I would've liked it quite a bit more had it not replaced AST. DT's cards feel more like you're mixing a set of potions, not drawing a card to do a reading and figuring out what to do with it.