Or it could be another folly of the Ancients, Emet did do everything right and figured that would work and recreate his friend but like how they overlook the life that now exists he overlooked that just giving someone all the pieces that made them who they are dosen't mean you'll get the same person, Zenos lead a different life and made different choices, even if he could have been everything Azem was freewill and environment meant he came out very differently.