She's probably fine in standard (madness is still around too), but I doubt she'd be worth it in EDH. Purphoros need not fear for his job!
Maybe the blue one will have an opposite theme? Can't attack or block unless you have at least
n cards in hand, and an activated draw ability? And also flying.
Rules change on split cards! Now their converted mana cost is always the sum of both halves, instead of sometimes being that and sometimes being either of the halves individually. This means (for example) that you can no longer put fire/ice on an isocron sceptre!
In general though, the change makes sense.