I love the idea of breakable grabs, and the "ball socket" type.

However not a fan of removing fracture (which should have been called dislocation, BTW).

You can create a great deal of modes around damaging your opponent and them dealing with the limitations of the affects of that damage. Fracture is a great way to have this, adding the new grip ideas would really open those modes up more.

I do agree on pretty much everything else though. Great list!