my thoughts too. i actually think they have set up the "mad queen" angle throughout the shows history. but they completely failed to stick the landing.
when she was surgicially decimating the fleet and kings landing army, i actually thought they were gonna pull a surprise "not the mad queen" thing. she was showing she learned from her dragons dying, changing elevation to counter the " really big crossbows." blowing the wall out from behind, everything. it was a tactical domination.
then the bells rang, they gave up, and NOW she decides to be all mad queen, after its won? meh.