"Three important [ERISA] breach of fiduciary decisions came down this summer.... [1] [T]he Second Circuit affirmed the trial result in favor of the fiduciaries but reversed on the district court's earlier dismissal at the pleadings stage of a prudence claim ... [2] The Seventh Circuit ... decided whether ERISA preempts state corporate law/breach of fiduciary claims against company officers and directors who also serve in an ERISA fiduciary capacity, as permitted by ERISA's 'two-hat' principles.... [3] [T]he Fifth Circuit provided fiduciaries and plan sponsors some comfort by confirming again that a plan sponsor's authority to amend its plan does not implicate fiduciary duties." [Sacerdote v. New York Univ., No. 18-2707 (2d Cir. Aug. 16, 2021); Halperin v. Richards, No. 20-2793 (7th Cir. Jul. 28, 2021); and Jackson v. AT&T Retirement Savings Plan, No. 20-30255 (5th Cir. Aug. 16, 2021)]