! I was pretty sure that everyone from the previous universe died and were replaced by similar lookalikes.
! that's what happened only to those killed between the offset of MiH and the death of Pucci. Everyone else just carries on with their life, probably even unaware of the resets (there were 2), in a world were there was no Dio to begin with.
So it's the ultimate victory of the Joestars on their archnemesis, but the unresolved continuity problems lie in what do the still living characters from previous remember about Jotaro and what happened to them. Is Giorno still allowed to live in a world where his father never existed? is Kira still at large? If everybody just died and was replaced… It's more of a downer ending than anything else.
Everything that happened in part 4 and 5 would be either canceled or made useless, both cases are a shame.
! So again, to answer the original question, I like the finale a lot as its part's, but it's implications on the bigger scale just don't sit well with me