meh....
I'm guessing the backup market, while intriguing and younger, was too rich for blood. You had guys that still had starter aspirations and teams that were probably trying to get a starters return for them.
It's a safe move from the standpoint of continuity in the lockeroom and someone Bob is comfortable working with, if unspectacular. As has been said, Bob needs to stay relatively healthy.
I understand why they did this now though, one of the top tenders available will likely be traded at the draft, happens almost every year it seems. That could touch off the "buy" period on goaltenders and if the CBJ sat deciding too long, they may have lost out on a CMac wanting to have a chair before the music stops.