That can be argued as a game mechanic You're assuming goku wouldn't sensesomething was about to happen as he has done multiple times before and IT out of the vault then blow it up You're assuming one punch/ki blast at the very beginning wouldn't kill Aetheon when the dude has been dropped by bullets Goku has teleported from different dimensions before It's goku vs the destiny universe so he will have no qualms about killing. Literally he could just sense something strong was in the vault, check it out, make it to aetheon, teleport out before being teleported ( or after as we don't know if aetheon time travel ability woukd hold true once you leave the vault) then destroy the vault