I actually felt the pacing of the climax was a bit messy, probably due to the time dilation, but it felt like the higher levels had little relevance. I also found the snow scene to be the weakest part of the film, probably because it was completely different from the urban environments of the rest of the film so it felt forced and jarring.

Your example of The Phantom Menace is interesting because I think the simultaneity was actually one thing that was done well in that shambles of a movie. IMO it was the poor characters and direction-less plot that failed that climax, not the editing of the different scenes.