Let's make this simple
Gauthier-Carlsson-Terry
Zegras-McTavish-???
Fowler-???
Mintyukov-Gudas
Roughly this going into next season (probably Vatrano in that top 6). If you want Zegras, upgrade the top 6 or top pair RHD with a guy around Zegras age or younger. Anaheim isn't interested in helping your team upgrade with a bunch of depth pieces or a draft pick that probably has less that a 10% chance of being as good as Z coming back. Ducks should be past tanking and looking to improve each year, not looking to trade youth for more picks and keep missing playoffs for a decade. If the main piece coming back is a downgrade, Ducks are not interested. Ducks also will be valuing him based off everything he's done and could do, not just the cold 12 game stretch from the beginning of the season.
Ducks need are top 6 scoring and top pair RHD (big guys that can play defense, not small PMD). If you're not offering that, chances are you're not getting Z. I'm not saying he's worth those pieces, just that Ducks have no reason to sell him for multiple lesser parts when we have a bunch of prospects that will need to see what they've got in the next couple years.