Originally Posted by
Mormolyce
I think the current problem is that when Blizzard makes a spell card, it's priced for minion removal but by default it can go face, unless they specifically make it otherwise (like Flame Lance). So it's very easy to tip aggro decks over into OP territory when you can fill your deck with 30 or more nigh-unpreventable face damage from basic cards alone. Eg Frost Bolt, Lightning Bolt and Quick Shot are amazing cards for minion control, and are appropriately priced as such, why the hell do they need to be able to go face? They're great early game cards, the fact that they double as a way to close in the late game makes them auto-includes in almost every deck.
If basic minion removal spells were minion-only then something like aggro Shaman would never have gotten so out of control. Similarly Kill Command's egregious ability to hit face (on a class with a million ways to go face) is one of the reasons face Hunter can never truly die out.
Some spells should still go face as it's clearly part of their intended function, eg Pyroblast (which is appropriately priced for face damage). But IMO, by default direct damage spells should only affect minions and the ability to go face should be the exception rather than the rule.