I agree with you on the Midlife Crises hitting both D and G at the same time, and I don’t care, I believe it had to do with their breakup, not just romantic, but probably the breakup of the relationship of similar ambitions they thought they had. Gillian cutting her hair – a sign of moving on from trauma, was a clue to me, and what she said about why she cut her hair (Times interview) sealed the deal, for me anyways. With David… its so obvious it seems like an joke, Joaquin Phoenix style.