Absolutely. I have been in the camp, going back to early last season, that Miller's max trade value was at last season's TDL as a super 2-run rental. In theory, he should've been more valuable then than Horvat was now.
On the separate questions of do I think the rumoured Chytil package and the current Horvat package are equivalent, and whether I would rather have the Chytil package than Miller, the answers are yes.
I don't think Miller is or ever was a better player, however.
And yeah, I've said in other post, the key piece of this Horvat trade is the first-round pick. It's clearly not a late first-rounder. It will likely end up in the mid-teens. There will be very good prospects available there from this draft class.