You had the feeling like she's holding all the cards? Looked to me like she hasn't got any cards left. Just like putting the high Sparrow in power was her only way to leverage what little power she had left after the council told her to go fuck herself - blowing it all up was her only way of gaining some power back. The only friends she has left are maester frankenstein and his monster at this point. Even Jamie looks like he's 99% ready to axe the bitch.