Maybe this would work, maybe not, buy why not have a selector when using CharacterMancer to create a PC using Tasha's or not, depending on whether or not Tasha's is available? Right now, when you create a Ranger, you still end up with the Favored Enemy Feature even though it's no longer used in Tasha's. And you're able to select a Canny feature, but it doesn't show up in the "Features and Traits" block on the Character Sheet (that one might be a bug, but handling it might be easier if you had two different creation mechanisms based on with vs without Tasha's).
