I don't think Trollboy13 quite understands how you do a rebuild. His proposed moves would make the Celtics a perennial 6-8 seed for the foreseeable future while giving away precious assets.
Danny's plan is simple - hire a young coach who may be a genius rather than an old tired retread; draft the BPA; ensure that the Cs have trade and cap flexibility; collect assets in the form of young players and 1st round picks; don't waste assets on players that can only make you marginally better; and wait patiently until the opportunity allows you to spend those assets on difference-makers.
It's not hard, but Danny is the master at this kind of plan. And right now he's executing it perfectly. He's gone from an gun that was nearly empty to one that is fully loaded with ammo to spare. Now it's just a matter of waiting for the target to appear. And if one doesn't appear soon, he'll trade away yet another asset (Rondo) for more ammo. Because in the long run, the guy with the most bullets will often be the one who wins.