I'm not if this is going to make sense, but don't read too much into the possibility that your W is depressed. I think when people go into WAS mode, there are elements of what seems like depression or actual depression. I don't think they transform into aliens in a flash of light.
I also saw signs of depression and MLC in my W early in my sitch. If it helps you understand and deal with the situation better, good. Don't let it stop you making changes for the better (for you), or make it an easy plausible reason for what is happening.
Me 42 W 39 Married: 11 Jan 1998, T: Since 1992 First Bomb: Sep 2007 Confirmed A/OM: 4 Nov 2007 Kids: D10, S5 Reconciled and together again after (alot of) time and heartbreak. 3rd kid, S, born 2 Jan 2010.