I think that Janeway's resurrection was achieved about as plausibly as it could have been, and for pretty defensible reasons. The idea that, in the original timeline unaltered by the Admiral, Janeway and crew did something that needed to be accomplished in the current timeline makes sense. Likewise, the use of the Q Continuum also made sense to me.
But was there really a need to destroy half of the Voyager Fleet, including the Quirinal
that Children of the Storm
did such a good job of introducing us to? It does seem like too much of a hard reset, IMHO.