"Get out more, blib? I'm out 6 nights per week. I do need a day of rest! I'm not John Lennon - I can't do Eight Days a Week.
I agree with your last two sentences. Valkyrie is an excellent film (which doesn't preclude it could be better), and accents shouldn't interfere in the enjoyment of it. Another excellent film, in this case regarding the frustration of dealing with leadership, is Stanley Kubrick's 1957 "Paths of Glory" which starred Kirk Douglas and concerned itself about the Souain Corporal's Affair. "Paths of Glory" is based upon the true story of four French soldiers, under General Géraud Réveilhac, unfairly executed for mutiny during World War I; their families sued, and while the executions were ruled unfair, two of the families received one franc each, while the others received nothing.
Sounds a lot like today. Just replace execution with Agent Orange.
As for the 'what ifs' - that's called making a choice. Whether it's a choice about everyday things (Should I see Valkyrie tonight or the Pink Panther 2?), or extraordinary things (What if Yamamoto had invaded Hawaii? What if JFK survived Dallas? What if the July 20 Plot worked and Hitler was killed?), "what if" is part and parcel of decision-making."