I see their architecture as being wrong. To me they somewhat lacked imagination.
When Sikorsky built the S-58 they showed they had the ability to reshuffle the (then new, that's right) norm when needed.
Here IMOHO the same company failed to come with a solution that wouldn't geopardize the function (the missions).
I believe that burying the GB downto floor level and side deporting the passenger cabin in two units with passageway behind and in front (where pilots would seat as in a normal design) could have led to a more practical airframe for the military. Maintenance? Unplug the side cabin (modules/clam shell ) and here you have the entire engine and gearbox at hand reach.