Hi Vincent,
I think combining both would really be the ideal. In the expedition plan you start out with two strength workouts a week and as the aerobic volume increases the strength training goes down to once per week for maintenance. But as an older athlete (I am 47) I have always stuck with the two strength workouts a week because I felt so much better with that routine and recovered better as long as I didn’t go crazy with the weights.
When the CMF plan first came out I ran the idea by the coaches here about doing the CMF workout once per week and the general strength from the expedition plan once per week to try and thread the needle. They thought that would work well for me and I imagine it would be worth a shot for you. If you are used to going to the gym and moving plates around the CMF plan will feel pretty strange. You spend so much time on balance to begin with you may worry about losing strength. I did anyway. I feel like getting both types of workouts in once a week allows me to progress along both tracks just a little slower than if I would focus on one.
Does that make sense?