The bitmap levels in Toon Boom Harmony lack the basic functionality present in most raster based programs like TVPaint and Photoshop. Harmony has no smudge tools or even brush modes like Add, Dodge, or Multiply.
-Have the Color Wheel available on Bitmap layers.
-Add BLEND modes for BRUSHES on bitmap layers - Multiply, Add, Dodge, Burn, etc
-Add smudge/blur tools on bitmap layers
-Make the perspective tool work the same as it does in vector layers.