He probably wouldn't be a good fit for Mike Denbrock's offense, since the short passing spreads out the defense laterally, which opens up the rest of the field. As much as I have criticized Riley Leonard this year, he has been effective as a short range passer, which has allowed Mike Denbrock to work with what he has.
Jalen Milroe's throwing strength is when you let him throw downfield. He actually throw a decent long ball, and certainly has the arm strength to make that throw.
When it comes to short range dink 'n dunk, though, where he has to make an instant read in 3 seconds, he's out of his element. Tommy Rees tried to turn him into a dink 'n dunker, but Nick Saban ended up seizing the reins after that failed experiment.
If Milroe were in a pro-style offense that drops back, lets him take time to read the downfield routes, I think he would be a good fit.