The real questions is since it will be at least two years before the frontcourt begins to max out, does it make sense to bring Bibby back knowing that he will be on the downside when the frontcourt is finally ready?
Another thing to think about is whether it is the backcourt that is driving the teams success, and if so, does it make sense to part with one of the young front court players in exchange for a veteran (the idea being two young guys is o.k., but another vet might help maximize results in the here and now) and go into "win now" mode.
My biggest fear going forward is that Brook Lopez keeps developing and the Nets bring in LeBron to team with Lopez and Devin Harris and surround them with shooters (power forwars with range like Anderson and Yi then make sense) and hustle guys. That could lock up the east for a while.