This may be able to defeat an unprotected player in five turns, however, the point is that most players aren't unprotected. Almost every FG-deck is a stall, and this got no creature nor pernament control mechanisms whatsoever.
Miracle may be the same, but she has at least miracles to save her.
A swarm of munumentumed 8 attack creatures may be powerful, but isn't that the same as what divinde glory does? Only immortal instead of momentum, but with explosions to destroy shields and such.