Certainly possible. He really is gifted as a run threat, but again in the NFL you must be able to win from that pocket IMO if you want to survive long years and get the most from that position. Being dependent on read option concepts can help a young QB early on in slowing the rush as they sweat the contain, but as you get older you lose speed and defenses become accustomed over time to stopping those concepts as more running QBs proliferate. It's like being dependent on the outside zone, defenses learn after years of Shanahan family run game terror how to shut it down and now even Shanny has to mix in power concepts.
But if you can win from the pocket the only way to stop it is pass rush. And if you have strong protections then the other team must have a great secondary and offball types too in order to snuff out threats underneath and over the top.
I think Milroe slides behind some of these other guys due to his need to develop more than them in the pass game. But I agree that does put him in that group that the Rams may favor, just as it does with Dart, as they have the starter and backup quality in place to where any QB they take gets an easy and very comfortable redshirt.
So basically if you are a QB in this draft and you fall to the Rams somewhere, at any pick really, it's like winning the lottery I think.