This has happened once before and they reversed it. But they said this last time too:
The discussions that have happened in various threads on Lemmy make it very clear that removing the communites before we announced our intent to remove them is not the level of transparency the community expects, and that as stewards of this community we need to be extremely transparent before we do this again in the future as well as make sure that we get feedback around what the planned changes are, because lemmy.world is yours as much as it is ours.
Did the admins state anything? I thought the issue here is that LW previously did something without an announcement, undid it and promised to communicate before doing something like that again, and now people are saying they haven’t communicated this time.
That’s the real issue, not the fact that it was defederated.