Mafia: general discussions.

making percentage-based defenses always carries the risk that the game will become unbalanced. When it's not needed, the defense will trigger; when it is needed, it won't, and a strong team will suddenly receive an extra boost due to this randomness, resulting in a one-sided victory and a lot of negativity...
Non-percentage-based defenses are better in this regard because they are completely predictable. If you don't plan something or don't take it into account, and it backfires, that's your problem; you should have thought it through better.