This point isn't often considered. We're well past the era of Mack players and we're still suffering through a roster full of holes that Charlie left us. He got some headline talent, and that earned him a reputation for fixing Mack's problems.
But he recruited unevenly and very poorly, overall. Herman has worked his ass off to plug the holes in the roster and recruit positions more evenly.
In the roster thread Machinator demonstrates it pretty clearly.
Pity for a man whose parting words were "the cake is baked" for the next coach? Strong was every bit as full of himself as Mack and never once doubted his own abilities, and he obviously believed that he could turn it around in year 4 or 5 in spite of everything.
Charlie was no doubt over his head. Many saw that clearly early on. Hell, the writing was on the wall for everyone with eyes to see. The Strong apologists kept their blinders on for a very long time, as evidenced in this thread.