Even if it could work, I would be against it.
Winning a Tony is something special, and I just don't think that they need to start adding random categories just so more people can win a Tony.
If it makes sense, like in separating the Design awards or Best Musical Director, then sure, add the category.
I mean, I'm all for replacements getting recognition they deserve, but that doesn't mean there should be a Tony category for replacements.
I'm probably in the minority on this, but that's how I feel.
"One no longer loves one's insight enough once one communicates it."
The opposite of creation isn't war, it's stagnation.