I'd say he is feeling a lot of pressure to do so much and he is confused about a lot of things.
Fourteen months seems like a long time but it really isn't for MLCers.
I would just lay low, give him his space, and let him be.
He has to get thru this on his own.
No R talks from you, no talk about OW, etc.
The Bomb: 08/05 H moves out: 06/2006 H moves back: 01/07 & Out again: 01/07 H moves back: 03/08 & Out again: 04/08 H moves back: 05/09 & Out again: 07/09 Divorced 08-12 Kids: 22, 20, 19