I figured as much, seeing as I edited the post, hence the double-post with the small updates today.
So yeah, all of the Mario/Luigi in-level spritesheets are indeed good for removal, and even the map sheets probably could be improved. I know for a fact that there's some unused map tiles, and no sheet as far as I can tell has quite all of the Mario/Luigi poses. I'll probably just add the few unused tiles to your sheet, much like I did with the Pac-Man Arrangement items rip and the NES Dig Dug II rip. In the latter, I could just add the Cape poses to the existing Mario/Luigi map poses sheet.
So yeah, all of the Mario/Luigi in-level spritesheets are indeed good for removal, and even the map sheets probably could be improved. I know for a fact that there's some unused map tiles, and no sheet as far as I can tell has quite all of the Mario/Luigi poses. I'll probably just add the few unused tiles to your sheet, much like I did with the Pac-Man Arrangement items rip and the NES Dig Dug II rip. In the latter, I could just add the Cape poses to the existing Mario/Luigi map poses sheet.