So there's quite a few sprites in ZUN's games that are absolutely ancient. Sure, they've been updated since EoSD, but the freaking hitbox and focus sprites are unchanged from PCB. Also, DDC+ has the new HD engine, but in HD, the sprites are just too small for good detail. See Mallet "You Grow Bigger!" in Shinmyoumaru's boss fight, where the player sprite grows to a large size and looks like a pixelly mess.
The current character portraits, when extracted from the game, are huge and have so many details that you can't see because of the limitations from smaller resolutions.
The question here is, should ZUN update his sprites to HD, or at least make them larger and more detailed?