Still don't like the 5 tile height gameview in large tile mode. It's ridiculous. I think Mario should just dump all other modes and make one good graphical view to the game with enough visible tiles both in vertical and horizontal direction.
I don't like the dungeon algorithm either. It's maze-like and boring to explore. When I think of mazes and particulary corridors I think they shouldn't just run here and there. The dungeon should have a clear idea, whether it's just for storage room or place that someone actually lives. No one lives in a maze but minotaurs.
There are more dungeon features like barrels to kick open. It's nice, but if they are all just scattered randomly in a maze it gets boring quite fast. I think that distinct level themes are the proper way to create nice gameplay, which then form the game world with different locations to visit.