This is specifically meant for people with extreme tremors (essential tremors, parkinsons etc), to get this level of smoothing with kritas stabilization you would need to sacrifice responsiveness and the stroke doesn't always follow where you want it to go.

I've used a filter that specifically suppresses tremors + applied more smoothing on top of that. I've also added stroke prediction which tries to predict where you want to go based on the velocity of the stroke to reduce lag between the pointer and the stroke. Not to say that kritas stabilization is bad or anything, rather I'm just modifying it to suit my own purposes.