I really like the NFL Draft Buzz site.

They do complete analysis and provide details on their methodology.

This is their summary on Milroe.

"Raw tools jump off the tape with Milroe - a nuclear arm paired with explosive athleticism that threatens defenses on every snap. His game-breaking acceleration and ability to stress second-level defenders puts him in rare air athletically, even in an NFL context. The flashes of brilliance against Georgia's NFL-caliber defense hint at his sky-high ceiling.

A smart offensive coordinator will tailor early concepts to his strengths - designed runs, play-action shots, and simple half-field reads while his pocket presence develops. The processing speed and anticipatory throws need work, but his pure arm talent lets him get away with being late at times. In the right system that embraces his dual-threat ability early, he can win games while the finer points come along.

The team that pulls the trigger on Milroe is betting on traits over polish. His release velocity and twitch put him in the top tier of arm talents in this class. When the game slows down and the mechanics tighten up, you're looking at a potential game-changer who can beat you from the pocket or split the defense on designed runs. High-risk, high-reward prospect who could be special if it all clicks."