I'm not sure moving Zadorov for a RHD necessarily improve the team in a net sense (all depending on who we target, and the acquisition cost). Soucy has been injured twice already so far this season. The depth on the left side after Hughes isn't that deep, if we trade Zadorov, we have Soucy, Cole and....Wolanin/Brisbois as our #4/5 option? I don't think Cole should be playing too many minutes, so keeping Zadorov for LHD depth might be prudent. Both Z and Cole can also play the right side, and behind them we have Myers, Juulsen (now an acceptable bottom pairing D) and Friedman (decent as a #5 option on the right side). I like the versatility of both Z and Cole being able to play both sides.
Unless for a clear upgrade, I prefer to keep Z, even though I'm not his biggest fan and definitely want nothing to do with an extension near his asking price.