his purpose? then why is he still around? i think the unredeemed arc gave him a purpose 😉. a living engine of destruction. like i said, in several occasions throughout his history, right up until now he gets bigger, or gets smaller. in that, his mind was altered and i dont even think he knew what he was doing. so i dont think his and thors scientific minds were present to confirm nor deny any gains in power.
juggernaut looked about his normal self. so he was about his normal power. plain and simple. and backed by several on panel feats over the span of several years in several books. hard to argue with that.
as for the original, i dont believe thor would or could do what he did again. for one i dont think juggernaut would fall for it. and i believe would go in more savage than usual. he can and will beat brb or thor down relatively simply if he gets mad. add in wwh? come on now, these 2 are going down (thor and brb).