I personally don't think that Zadorov's benching is unwarranted. It's not really a matter of what he is bringing to the ice - he has been somewhat more effective than Barberio and Graves in tougher minutes IMO - but he is (as usual) performing well below what he can do due to what I see as mindset/effort issues. In particular, I agree with
@henchman24 that his 2nd period decision-making against the Caps contributed significantly to their goals.
Z is still this team's physical X-factor and I don't think that the benching goes against that idea. Bednar has been able to get him going historically. I also think that Cole should help in stabilizing Makar in the short-term although I do like the Z-Makar eventual pairing.
I also disagree with the notion that a winning team should refrain from making any changes at all, especially this early on. Things are certainly going well but it's a good time to experiment so that they could be even better.