I'm sure they'd look fine, but not quite as uniquely PRS. They're probably also available in nickel as well as chrome, so you can get them to match if so desired.
I'd change them out if I toured and needed to get the knobs pulled up quickly. In the studio there's plenty of time to just deal with the lampshades.
The perfect solution would be if PRS simply put a tiny flange around the top edge of the knob, you could easily grab it. Their guitars are so detail oriented, it surprises me that no one at PRS has done it, since the rest of the guitars have ergonomics covered in spades. All you'd need to do is have it add to the ability to pull up - it could be nearly invisible so as not to spoil the look.