I am pro-tank and pro-keep Rondo. I don't think he will be physically in shape enough to get wins in the beginning of the season and I think the East will be tougher than it was last year. I mean, we barely made the playoffs with KG and Pierce playing over .500 ball after the all star break. We will however want him when we get a good player in the draft, as I think we're basically guaranteed a top 8 pick. That player + Jeff Green + Rondo are a great nucleus, then we have Bradley / Olynyk / Sullinger / 5 first rounders / whoever we draft from the Nets pick in the late teens / big expiring contracts to use to trade for another superstar. Getting a team like that to gel is hard, but I think Rondo is the perfect guy for the job.
We could see something like
Rondo
Bradley
Green
Olynyk
Willie Cauley Stein
then add a superstar via trade to either the 2 or the 4 spots. And that is only a year away and assumes we get the 7th pick or so.