Four Swords Adventures is only the visual pinnacle of 2D Zelda games to the extent that it did things that simply wouldn't have been possible on the GBA. It's not really a fair comparison, and I wasn't a big fan of the lazy reuse of A Link to the Past sprites.
I thought The Minish Cap looked great, but I agree that the world felt a bit small and cramped. You have to travel to Death Mountain from Hyrule and it's, like, two screens away or something. I also thought the actual minish cap wasn't that interesting to use, but the game overall was a lot of fun.