Rebelle-like Perspective Tool, PS Pen Tool, Different Sketchbook Pro-like Brushes, Air Brushes, etc
Also, wished Artrage Vitae had PS Masking tool, Illustrator-like stuff, Animation tools for beginner to intermediate lv, Grid that helps in character design, environment/Lv Design
Custom Brush making, More pigment options like Acrylic, gouache, Chalk, charcoal
Even having different Canvas Paper-like would be great
Also, Tool that allows direction of ink drip like how in Rebelle