first this is not caused by the servers, if it were then everyone will be suffering with the same issue but the only ones with these problem are the ones with consoles or people with computers that are not that strong because they can't handle the spaghetti code of the game
Sorry, but they are right. My girlfriend has been playing on XBone, and ever since the Ep4/Steam update (I can't remember if those were on the same day), the game has been unplayable there. Before the update, everything was just gravy. The graphics were a little bit uglier than on PC, and the framerate wasn't silky smooth, but it was more than playable. I've been playing on PC, which is very likely a separate client than the XBone, and none of these issues have popped up.
I don't know if it's the servers or not, but they seriously broke something in the XBone version of the game with that update. It's not just in the lobby, it's not "quantity of players", it is not "quality of internet connection", it's not "the hardware can't handle the game"...it happens on loading screens, it happens in the drop ship, it happens during missions, it happens in empty blocks, it happens in the salon, it happens everywhere, and a few weeks ago it did not happen. "I couldn't move or type for five minutes" isn't an exaggeration, the game is now un-play-a-ble.