This team isn't looking to make the playoffs. I suspect more moves are on the horizon - particularly with Jeff Green and Brandon Bass. Along with Rondo, they're both in their late 20s, could be free agents at the end of the year, and have already been rumored in trade discussions.
Danny's gone into asset acquisition mode - it's one thing to commit 4 years to Avery Bradley who just turned 24, but it make sense to give Jeff a big contract that takes him into his 30s.