Spells hitting face are fine, as long don't have many of them with insane damage for mana proportion, like 5 damage for only 2 manas and ways to get multiple copies, because the card was spend, a 3 manas 4/2 charge deal 4 damage in the turn was played and if opponent can't remove deal another 4 damage in next turns and so on... spells give damage 1 time and is gone.
"Leeroy IS the problem" meanwhile Fireball costs 1 less and deals 1 more and is benefited from spell damage and you can run two of them.
Leeroy is not a problem in any other class besides Rogue. IMO that means that certain Rogue cards should be looked at, not Leeroy.
I feel it's obvious the problem is evil miscreant, but I only see people complaining about cards that don't generate near infinite number of overpowered onedrops.