Texturing improvement suggestions

Some concept artists like to use a square brush instead of a circle brush to create props and especially for stylized weapons and sci-fi concepts. In Krita there is an option to change the shape between Square to Circle, an option like that without having to import an alpha will be great.

For the texturing Blender has a default brush and a soften brush to blend the color like other painting software like 3D Coat have. In 3D Coat holding Shift use the Soften brush to smooth the transitions, having it available in Blender while holding Shift will be good and it's similar to how sculpting is done in Blender: blocking out the shape with Clay Strip then smoothing some areas.

Unified strength should be enabled by default. Without it the strength varies from one brush to another and it's not intuitive to have a different strength for each brush. And users that don't know that this option exist will have trouble to sculpt and paint.

Blender should have a way to setup layers and blend mode like in the Blender render shaders but with Cycles/Eevee.