Just add a freaking option on the menu allowing you to tick which DLC items you want and which you don't want. If they're gonna force me to buy everything with the Expansion Pass, at least allow me to choose what I want in my game goddammit. I agree these items shouldn't just be lying around like that, but personally I'd rather those items weren't in the game at all - they're fanservice, and they detract from the immersion and "purity" of the game.
If they let me, I'd untick everything except Master Trials, Champions' Ballad and the Korok Mask (and QoL features like the Hero's Path and stuff). Hate to have the adventure log filled with stupid sidequests for fanservice items.
They should let you get both DLC parts for separate to begin with. If they don't let you do that simple thing... what you say will never even be considered by them xD
This whole "expansion pass" system is pretty bad overall...