Pace "found a better safety than what the Bears have had". Ok a "win" of sorts but big picture it doesn't mean much right now. If Pace bought one year of stability at the position or maybe two that's a positive of sorts as it allows him to move forward in other areas that are "more important" but where I think we need to step back is in the evaluation of what Amos does or means LONG TERM and big (Super Bowl/playoff) picture for this franchise. It's two separate evaluations and we need to be careful in not confusing them because adequate or stable in the short term doesn't necessarily translate to the long term/big picture(for that specific player).
Essentially if Pace knowing Amos can hold down the fort for a couple seasons allows the Bears to allocate resources to other areas like QB, LT, WR, RB, LB, DL, CB, whatever and they don't have to worry about one safety spot while Pace sures up other areas that's good. Then in 2-3 years when Amos has served his purpose you go back and upgrade over the top of him as some final pieces to the puzzle as he helped afford you the time to get other players in other positions.
It's entirely possible that in seven years if the Bears win a Super Bowl Amos isn't on the roster but you can look back at all the moves and draft picks and say "Hey, taking Amos bought us a couple years at safety where we didn't have to reach for a player so we could take guys X, Y, Z that were all major contributors to the SB run."