First off, the FO gets rid of players. Perhaps Harbaugh will have his say, but I'm not sure who it is that we got rid of solely because they bumped heads with Harbaugh, who would have otherwise been a great service to the team. Please don't say Boldin, because there was no indication that he and Harbaugh didn't get along. That IMO was purely an Ozzie move. Who else are you thinking of?
The enforcer of the secondary AKA the patriot killer. Does Bernard Pollard ring a bell? Does James Ihedigbo ring a bell to name a few?
Pollard was reported to be a real locker room pest - and also, as great a SS as he was, he was also a flag magnet. He gave the opponents a huge lot of free yardage.
And he wasn't all that "great." He was a good tackler, hard hitter and good vs the run, but he was AWFUL in coverage. The backfield we have now is actually awesome. Webb and Weddle had their first season together (Webb's first season at safety), and they were really good (aside from some mistakes). If we can shore up our CBs and get a pass rush, we'll be a great defense. Tavon is awesome, and is only going to get better. Canady showed promise; and if he comes back healthy, I think he's going to be good. Jimmy is not dependable, Wright sucks, and Powers is just middle of the pack.