Our gen server has 'soft crashes' where it bucks all the players out, but they can immediately rejoin. But in that time your missions end and you have to start again and your Master Controller fight is a full wipe.... it SUCKS. We've wiped probably 5 times in total while doing MC. We have to time it to get in there RIGHT at the save and pray to god we can push the phases fast enough to be out before the next save.... otherwise kiss your whole team goodbye.
Further proof the devs have no idea how their game works, nothing has been fixed on gen ever.
