That was Obito, who is not on this team. Just because he had the same power does not mean Naruto can use it the same way (At least I haven't seen him use it that way and it is only team 7 here correct?)
Oh I thought you were referring to their other attacks, then yeah I agree. If they are ever going to do damage it would have to be with a Gudou dama. But his size and regeneration overwhelms any shields they could make
It probably wouldn't one shot since it was probably bijuu dama size and would most likely only hurt them. But that damage would be easy enough to give him a chance to smash them to bits.
As I said before they may make one big but I have yet to see a gudou dama over a kilometer in size (I think the biggest was maybe 100 meters?) Also it'd be easy enough to block with his arms, lose them and then regenerate more of them.