Actually, it's not that bad, but it would be better if you could choose the heroes, so that at least something would depend on the player, and not on luck.
Added 3 minutes later
And in general, the balance on the cards suffers, as has already been said, and this randomness covers up this shortcoming. So at least there would be more fairness...
I don't care at all what the tournament game schemes are. All options are acceptable, I think.
