Size matters especially in the NFL. Tell me in modern football how many guys at any position succeed at 155 lbs?
Receiving and returning kicks is a specialty, and not everyone can do it to a high level. He can't. He has been tried and what happens is that 1) he gets hurt, and 2) he doesn't produce.
That said, who knows? Maybe they are going to be trying him yet again. But... I have heard zip about that and if anyone might have an inkling that this is going to happen it's Jourdan... and she hasn't said so. And there is NO reason for McVay to keep it a secret.