Steve - Man this post resonates with my day as well.
The ambition can make this harder. I'm also attacking GAL like a maniac - at first it felt great, but now 3 weeks in there are days where it all feels kind of empty. Work, gym, hobby, friends, repeat. I've been throwing in some guided meditation apps which helps. The ambition can lead to burnout. Ambition is great in work, school, etc. - you work hard, you achieve. That's not how it works in relationships, in particular these cases.
One other idea is make sure you have an indoor hobby or something when you are home alone. I have a little project going, watch YouTube videos about it, etc. It can eat up endless amounts of time and tickles the part of my brain that seeks achievement and learning.
What are you covering in MC? I'm just curious. I'm in the same boat - MC once every 1-2 weeks, and terse logistics-oriented texts (in my case surrounding the kids primarily). We have a once weekly phone chat to cover logistics only. MC feels completely aimless - we are working on "communication" which helps with the co-parenting and logistics but addresses none of the actual, ya know, MR. I think human brains are wired for survival - lately my conclusion is that everything I learn in MC can be applied to my next relationship, whether that is with my W or someone else - but maybe that is my brain desperately trying to put a positive spin on things. I definitely don't understand how my path is leading to reconciliation either, but I can tell I'm growing as a person and a father and that's enough for me most days.
I imagine healing just takes a really really long time. I would say I'm sure there is a part of her that misses you, but that is beside the point. If and when she misses you enough, you will know.