That could work. 15 managers doing 10 1:1 meetings each isn't so hard. It can get tricky with people being on vacation etc. But very possible and normal.
Sucks for everyone. I’ve been laid off by email, it’s fine.
Net positive in my book. Of course on an individual level it sucks, these are people with dependants and so on, but so are the 200 who were saved.
(Though, here in the UK, redundancy procedures can take weeks, so a few days is not much compared to that.)