I dont mind reviewers taking into account network stability, as long as its a part of their review criteria and each game is tested accordingly.
Similarly, with regards to review scores getting updated, i dont mind it as long as the reviewers are consistent with dealing with all games in the same way. In this case that would be updating every review that needs updating.
So as long as the reviewers are consistent in criteria and evaluation, then anything goes really. If they not consistant then it becomes a problem.