Thanks for the reply. I probably shouldn't have even mentioned my experience. I was just interested in hearing specifically what it is about wrist grabbing that makes it ineffective, and thought it might relate. Considering my lack of ability I should have probably assumed it didn't and stuck with the question itself.
So it's just ineffective? No specific reasons why?
It's a limited contact point that's easy to work around, regardless of strength, using simple mechanics and it doesn't offer very much force potential or feedback. Ok for connection exercises, but not for building the skills needed to make and move that connection.