It's another enemy that can end his life, so it's pretty significant.
lolwot. ST doesn't work that way, it pushes you back but it doesn't necessarily make you go poof. Naruto's clones didn't go poof on multiple occasions, and yes, they were not SM. Minato's clones going poof is fallacious, they move backwards and then they blitz him. Not to mention, IC Deva almost always uses a linear ST, and only tends to use his 360 degree ST on large targets. So he'll still be open from the clones surrounding him.
It comes down to this.
Clone goes for blitz and is sent back via ST
Clone throws FTG Kunai while flying backwards, said Minato Hirashins to it and tags Deva. Game over.