So far in this game the only thing that has stood out to me as potentially unbalanced is using allies to block big villain attacks. It seems like right now Leadership is better at stopping damage than Protection. It just doesn't matter if Ultron is about to beam you in the face for 10 if Maria Hill can just jump in front with her 1 HP and negate it all.
The only time I've felt like the heroes were really in danger was when Rhino had Charge attached or against Goblin and he's doing a lot of indirect damage.
It just gets even better when there are a bunch of abilities that trigger on the villain damaging you, which they never will.
Does anyone else think this is too efficient? Should encounter decks have more Overkill and ally sweeping effects? Should this maybe be nerfed by a house rule that a villain always does like half Overkill or something?