One thing to consider is we easily become accustomed to doing content overgeared, that even if there are a few bad players it generally doesn't cause a big difference because everyone else can still carry them through it. Patch 4.4 is barely 3(?) weeks old, it's expected that players will be minimally geared for a lot of the new stuff, and we would also have players returning after a hiatus and are rusty as hell when it comes to mechs. Ok sure these don't give a full explanation on the performance of players recently, but for sure if you try this content again in a few more weeks, they will be more used to content and if not, at least more people will be overgeared to offset any weak links in the party.