If selected it would be utter madness to have him sitting on the bench for the year, IMO.
Giving him a few packages to run throughout the year could do wonders for the offense while also giving opposing defenses something extra for which to prepare.
This. He'd technically be the no.3 QB, but create some red zone/RPO packages for him to get him up to speed. Iirc that's how Lamar was used his rookie year before Flacco went down. The blueprint is already there thanks to the Ravens.
As a sidenote McVay remembers anytime he gets absolutely decimated like he was by the Ravens offense in 2019. After Vic Fangio and the Bears destroyed the version of his offense that was unstoppable to that point in 2018 he went on to emulate that defense with Brandon Staley, a Fangio disciple.
Obviously he hasn't had the personnel to copy the Ravens to this point but you could see the fascination with mobile QBs in the years afterwards when he insisted on trying to develop Bryce Perkins and John Wolford despite both of them having extremely limited arm talent. Milroe could be the guy he's been looking for...