Even with the brush tip panel slider all the way to the right, It would be nice to have the preview even larger to show fine detail on the tips. If not larger in the window, maybe a
rollover with a modifier key which would temporarily pop the tip larger.
Using detailed brushes for hair, some kind of enlargement option would still be great. Even 8 months later. Yeah, I know it's not AI so the "wow" factor isn't something for advertising, but it would be helpful nonetheless.