He didn't get it "wrong" though - he purposefully made much more powerful rares in the very first set. Maybe he now believes that was a mistake, but as a limited player I don't think it was! I like having some powerful cards show up from time to time but not to have the draft format dominated by them. Their latest change makes rares show up more frequently in packs and it is really bad for the sealed deck format IMHO.
I think the ruleset in MTG especially with all the mechanics introduced is way too complicated to balance at this point. It's got the card game equivalent of Turing completeness and the best they can do is ban cards that turn out to be too powerful from competitive games as their utility is discovered.
