I actually have implemented all Jonas' tips from his video. There's 0.2s Coyote time & Jump input remember time. The jump falloff when you release the jump key is 0.6 (probably should be lower). The only thing that's missing is acceleration / deceleration, which I agree is important when you want to move just a little.
Eh... about the medium height jump... There's no instance where the game wants a medium jump from you, so that oportunity is kinda pointless to me. With the super jump it's possible, but yeah without it you can either do a small jump / high jump. I'll try to find a solution to this. Thanks though for a descriptive feedback :D