That Gibson trade is a massive massive overpay. Try looking at his numbers the past 3 years- hint they're not good.
Ducks fans have said their dcore is better than the Oilers', so why would Gibson's numbers improve at all in this swap?
Holloway's stock has risen significantly since his draft as a recent mid 1st rounder, adding on 2 1st round picks is absurd. I don't even think Koskinen is much of a negative asset, he is a UFA at the end of the year and his numbers aren't even that bad, hell they're better than Gibson's over the past 3 years and thats behind the "terrible" Oilers defense.
Plus the Ducks would need a stopgap goalie if they moved Gibson anyways.
Edit: I didn't see Gibson was retained. That makes the trade a little better, but seriously when has a goalie ever returned 3 first round picks? They just don't carry that much value, especially when they haven't been elite since 2018