Thanks for the comments!
Dirk, Backpacker had no route expectations for me. They are very understanding of how thruhikes go, and especially understanding of the choose your own adventure aspect of the CDT. They consider the track that I collected to be "one thruhikers version of the CDT." Good dudes!
There's actually pretty good coverage on the CDT. Verizon is clearly the best. I often had cell coverage, especially when I was in Colorado and New Mexico. I general, I could guess the areas that would have no coverage. They're no surprises. Glacier, The Bob, Anacondas, Winds, Gila, etc Big wild areas...