It's interesting reading about your W's with your kids, while my W is a working mom - she has never had a strong relationship with D and finds it contentious most of the time. So I think her leaving is part to escape that and part to escape me...
Meanwhile I've got a great relationship with D and I've used this time to make it all that much more stronger - it's a gift in a way from my W and there are no expectations on what she'll do vs. what I'll do. I know when I'm with D she's 100% my responsibility and I'm fortunate enough to have her 70% of the time.
I have similar feelings and think my own adjustment won't be difficult, but I also know it would be tough on my son.
- m and ww in 30s - s4 - m 11 yrs, t12 -ilybinilwy ~5/16 + request for OM - bd 7/16, confirm ea and strongly suspected pa - 9/16 ww claimed to have broken contact with om