Is swords and fragmentize unplayable because of misstep?
This is a great removal spell. .
No but the decks the internet bring Fragmentize in against dont play Missteps. Or the Misstep your Misstep circlejerk ensues vs something like Oath.
I'm not trying to argue, I just think the original statement is hyperbolic (perhaps for comedic intent). I agree that Mental Misstep is one of the all-time great mistakes in Magic, but its existence doesn't mean we stop playing Ancestral Recall or other one-drops. As a mater of fact I posit that it's pretty easy to get a bad player to waste their Misstep on something dumb and allow the better player to cast their more important spell.
Anyway I think this is decent removal and it could fill a role. Not losing four life to cast for one mana is huge.