bone
5-14-6-1
Sadly I don't know if the search for GM or coach really needs to be a long one because you could probably count the legitimate candidates on one hand.
For a long time the organization's management was bred internally through staggered, methodical growth and attrition. Pretty much at the same time Maciocia took the reins was when that broke. Ever since it's been a scramble to hire the next best external candidate, which is almost always a retread of someone that's been through about 6 teams at various points and is the only one available with any sort of track record.
And interestingly the most success GM hire was actually an internal hire promoting Hervey from Scout to GM, but then personalities got in the way.
The key thing to your observation however isn't as much about Maciocia taking over but moreso evidence that Campbell really understood how to grow sustainable teams, though he also had the benefit of working in a pre-SMS era for a team that was the richest in the league.