Shingle manufacturers will not warranty roof shingles on unvented roofs. Additionally, the ventialtion scheme you are using is a best unreliable, and probably doesn't really work at all to move air. In summary, I would follow the plan you have described. It seems like a well thought-out approach. The code official may give you trouble.
Roof venting is specified in the code.
At the worst, leave the non-functional vents in place to pacify the inspector. I am at the stage of insulation and keep getting conflicting reports on the cellulose vs fiberglass products. I like the idea of the sprayed in cellulose in the walls and the contractor claims there is never any settling of the product because it is supported by glue when applied. All the cellulose product I have ever seen is in the attic area and it has generally settled quite a bit. The costs are pretty equal with the cellulose being a few hundred higher ie 2500 vs 2100.