When symmetry painting is enabled, would be nice to have picked brushes flipped on the other side of symmetry point as well.
Atm I would need to disable symmetry painting and flip brush manually, nothing big, but still this could improve flow of work 
Some user wished that before. It’s on my list, but not at very top position. With some luck the new tool engine I created for 7.3 could make this easier to add than it is at the moment.
Also if it’s not too much trouble symmetry painting in 3d would be nice too.