I doubt the pi foundation are remotely concerned with how open the soc is as it has absolutely no impact on the core uses of the pi. They're smart people and would have made a different choice were it the case.
I've seen statements from them about this. They do care but they also are pragmatic and made the choices they had to make to reach their goal, which was to have a small cheap programmable device with enough power to make cool things easily. Openness came second to that.