1. Add opportunity separate brushes by colours. As it made for layers. For example so. 
2. Add in symmetry mode opportuity to use other instruments except eraser and brush, like smudge.
3. STOP updating photoshop for no reasons and add new bugs.
This is a user forum answered mainly by volunteers. We do not work for Adobe.
You can raise bug feature requests at the link below , where they will be seen by Adobe staff.
https://feedback.photoshop.com/photoshop_family
Dave
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