I think it's important to note that no matter how long one has been playing (and it's been almost 4 decades for me) that you can always "tweak" things to improve one's playing.
Case in point, usually when I played hi=hat, it was with a very french (thumb on top) grip. This worked great for playing Swing but didn't let me use much wrist. That was problematic when I was trying to play hi-hat accent patterns in Funk and Brazilian styles. So when I do hi-hat with a lot of accents i switch to a more german (thumb on the side) grip.
For a great example of how this can work for us, here's the great Jeff Porcaro:
Try it and see if it works for you!