Speaking of music, down the line I think the Home version would benefit of having an option for the PC-Engine Hucard version tracks which are a vast improvement over the Arcade originals.
Music volume is still too high in V.1.1. It doesn't completely overpower the sound effects now, but In my opinion it should be balanced to the "SEGA" voiceover at the start to have a baseline, as it's definitely too loud compared to other Megadrive/Genesis games.