That picture forces a lot of nose down, if you have trouble throwing nose down, it could help you if you can't manipulate your wrist during your throw. If you can consistently throw like that, it shouldn't be bad. But, for those that can manipulate wrist angles during their throw, which is quite easy once you get use to it. This is something what your wrist should look like, and one of the most general places to grip. These pictures show variances in the grip, I described. And the variances of the grip described in the first post, which is how Avery grips.
If you're having trouble throwing nose down with the disc in the Lifeline/crease of the hand, you need to start forcing your wrist down to achieve nose down. If you can't, then possible changing your grips "could" work. But, you need to learn to force the wrist down, as it will benefit you more.
Wrist down orientation
Open hand with disc showing disc with wrist orientation
Closed grip with disc in the "lifeline"/crease of the hand as shown above.
And, this is how Avery grips, and is the grip discussed in the first post with the disc in the "line" just below the "lifeline"/crease of the hand.