I've been wondering why the Heat haven't been going after Monroe as well. Spending on a 24 year old big man with low post skills seems like a good use of money... especially since he would match up well with Bosh.
I think the Celtics need to commit to a rebuild considering how things have been unfolding. That means trading Rondo. You're right that Dallas and Houston have nothing to offer, but I don't see why Sacramento would not still be interested. They have some nice pieces to trade (Stauskas, please).
Two weeks ago, I thought we were stuck with Green. After seeing some of these contracts, Parsons and Hayward as you mentioned, I see no reason we can't trade Green. I would think Charlotte would be interested and I would be happy to take flyers on MKG and Biyombo.