A rebuild done correctly does not force young players into the NHL before they are ready. See the model followed by Dean Lombardi. Players who never saw the minors were Kopitar and Doughty (one an all-star, the other a generational talent), Jack Johnson (sure could have used at least a half season in the AHL), and Kyle Clifford (a man child with incredible strength). The rest of them Martinez, Muzzin, Lewis, Quick, Bernier, Toffoli, Pearson, Voynov, etc. all spent substantial time in the AHL.
Not forcing young kids into the NHL before their time is the whole point of bridge contracts given to established NHL vets like Handzus, and many others. A proper rebuild takes time and patience.