All that would do is assure your heels hit the crank arms and chainstays. Again, to what benefit?

The first version of Speedplay's "MTB" pedals were called "Magnums" and had no inner stops to limit the float. They were tricky to use because heel strike was a frequent problem unless you were very careful as you pedaled.

When Magnums were redesigned into the current Frogs, Speedplay added inner rotation stops to avoid this problem. Having ridden both models, I can attest the Frogs are much easier to use.

There is no reason you can't set up Frog cleats to have plenty of rotation to the inside if you want it and don't mind hitting the crank.