Even in an 8 team keeper league, I can't imagine a scenario where either Doughty or Weber should be dropped outright short of one of them losing a limb or some such thing. Both of those guys are foundational D-men in any keeper league.
Granted, I'm slightly perturbed by Doughty's slow start (have him on my roster), and relatively concerned about the prolonged funk that Weber is in absent Suter. But there is still no way I would ever drop either one for a guy like Voynov (whom, mind you, I also like quite a bit). If you're desperate to give one of them away, I'm sure someone will give you some compensation (even if just a decent draft pick). Still, I'd hold your horses on this one.
14 Team H2H Dynasty League (14 keepers, 21-man roster, no farm)
G, A, PPP, SOG, BS, +/-, GAA, W, SV%