You know how unlikely that is.

[ Far as he can tell, Piotr had tried to kill him mostly because he couldn't stand the idea of Miles as his heir. This would be that, he's sure. Except even easier to deny, and take as insult. ]

Even if you'd convinced him somehow, no General worth half his salt would commit to such a large-scale change of directives without seeking further confirmation. That would've taken too much time. Not to mention, you'd have more than just him to convince.