This is something I want to do — because you’re right, it’s a bit weird. Some pretty legacy system things we built that need to be pulled apart in order for us to do something like this. But yeah, it’s not just kanji as radicals, but it’s also things like radicals that are the same as kanji you learned previously — I mean, maybe you ought to learn them still, but they should really just burn after a couple turns in your Reviews, probably (I think we’re closer to being able to do this over the other one, actually). And, vocab as prerequisites for vocab. We create soft prerequisites by separating these pairs / groups of vocab across multiple levels, but would be nice if we could just say 仕方がない requires a guru’d 仕方 to unlock. That said, in some cases (probably not this one), separating by levels helps to deal with some of the interference that can occur between similar items.
Anyways, this is just a yes yes yes from me, though I think #2 and #3 are more likely to happen just from a “it relates more to the things we’re working on right now” perspective. That said, no promises or expectations, but I do agree 