Her problem is that she always resort to that pseudo berserk mode
even if it's real berserk mode it won't end good, in situation like that party members need to cooperate to each others to fix it
then she chooses to throw away her rationality, in serious situation it may result in everyone's death
well, they're in comedy genre so each of their strange trait are boosted and I may serious about this too much
but at least when story come to an end I would like to see them success to fix their flaw as it's one of this story goal