Thank you for the compliments!
Which build were you playing on? Is it the web build, or any of the Windows downloads? On my PC, Mizuchi's speed works as expected on stage 3, and when focused she has a white circle over her sprite showing her hitbox just like the official Windows games, and she is slowed to about 45% of her normal speed, using a speed multiplier, so it's technically impossible to have her focused speed *not slower* than her normal speed, unless her normal speed is somehow extremely slow. Does your game have any FPS abnormalities (too slow or too fast)?
And also, the melee swing on stages 1 and 2 are also a common feedback we've had, currently it is pretty big (especially on Mizuchi's sides), but it only detects the orb for 1 frame when pressed, much shorter than what the animation suggests. Our latest non-Jam build has fixed this, if you're interested.
Regardless, thank you for the comment!