You brought up two different points, the coaching and the GM/personnel department.
Sean McDermott doesn't look like a really new idea at all. Most NFL teams cycle through personalities. You have a players' coach, next guy is a disciplinarian. Remember when we went with Gregg Williams after Wade? He is another defensive coach who will be playing a scheme based on zone defense where the front 4 attack the line of scrimmage. We had that in Jauron/Fewell. I don't think he is a top end X's and O's guy. He seems to want to be an admin/CEO. As does his GM who came with him.
The guys we hire are just names. Until they start drafting top talent it means nothing.
I guess we're going to find out how Kyle fares in SF, and we'll have to wait on BJC being hired as HC then.
Your hijacking of threads, tho! It is something!