Ducks don’t need an elite or Top #1 D, they need the best compliment pairings for Drysdale and Fowler for those two to be able to play their game, and then eventually for Zellweger. I would not trade Zellweger for Chychrun, who may even have a higher upside than him.
This will get some heat, I honestly don’t think Lindholm was the most ideal D partner for Drysdale.
Drysdale has #1 potential, get him the most ideal pairing where he can reach that potential. If the Ducks bottom pairing ends up being Vaak - Helleson, with players above them being better and in a higher tier, the Ducks will be in very good shape on D. If those two can reach their potential, it won’t sting at all when they need to fill in a Top 4 role due to injury, which has been the biggest issue the last 3 or so years.