It's easy to fall on making VRC6 arrangements of 2A03 songs extremely busy and unnecessarily complicated, but you've hit the perfect sweet spot here between making a fuller-sounding remix, while keeping it clean and extremely well-balanced. I can kind of see that you followed the Shovel Knight route, making sure the 2A03 part is the focus ad good on it's own, while using the VRC6 for embellishment, counterpoint, original touches, harmonies and more depth. Great job!
This is honestly one of the best Quick Man mixes I've ever heard, better to surpass Rushjet1 even. I'm not sure if I'll ever finish it, but could I use this remix for a Mega Man fangame I'm working on?