this scenario happends somewhat often: SS steals everything and in the next turn astra used her powermove and put permadeath healblock and perfect corruption on your team. that's just game breaking. no other char can do similar things in such a devastating manner.
even if you can beat the def from time to time the moves itself are just too much. some slight adjustments are absolutely necessary imo. interesting that no dev said a single word about this so far.