I think a lot of those issues has to do with stack overflow on the server. I heard about lag so made a Sorcerer specialized with Blizzard, massive resource reduction and generation per second so I can spam that. Causes a lot of lag, but haven’t gotten a crash, yet.
With damage output becoming so high as people are min/maxing their builds it was bound to happen. From what I have heard Blizzard is compressing numbers in a future update to fix that issue.