I could see that work for the Warden. Druid is the sort of "Primal" caster while the Warden leans more into the shapeshifter.
What I had in mind was more the continued existence of the different arcane casters. I know people disagree, but I don't necessarily think that Learned vs. Innate vs. Patron arcane necessarily are strong enough archetypes on their own merits. I would probably prefer stronger archetypes that gravitate more towards playstyles and themes. But I've spilt enough ink talking about that elsewhere.