The bug is noted, I know how to fix that one.
The slight pause on the sword charge shot is based on Zero from X3, which grounds you when you use it for a short period. It's a small drawback for the powerful attack you get for being in melee range that can be deadly if you use it at the wrong time.
The controls are made to feel like X all the way, but the dash probably does deserve a smaller hitbox. Dash jumping is also a thing too so Down + A might not work well.
Thanks for the in depth critique and compliments!