I think you're a little biased here buddy......he was strong no doubt but Root?we all saw what they're capable of and it's not very impressive U_U
Ehhh... Maybe not. I mean I think there was a reason he wasn't written into the story. I mean Pain was strong enough to take on ALMOST all of Konoha, but had Danzo and root stay down because it would have severely put the fight in Konoha's favor, especially if Naraka path was taken down first.
Had Danzo been there with Root, they might have actually won WITHOUT Naruto as Danzo has Izanagi which would have been extremely useful against God Realm's Chibaku Tensei.
I mean get crushed but appear behind him.