Adobe Animate introduces GPU based vector brushes called Fluid Brushes. They are the same brushes as Adobe Fresco and have more options for configuring your line style. They are GPU based and hence are more performant on supported platforms.
Apart from being able to configure the size, taper, angle, and roundness, the tool provides the following options:
Stabilizer: Helps in avoiding minor fluctuations and variations while drawing a Stroke.
Curve Smoothing : Helps in reducing the number of overall Control points generated after the Stroke is drawn.