Even though it doesn’t directly affect me, I think having US 31 as a freeway from Indy to South Bend is a must. As of now, the only major freeways north of Indianapolis serve specific sectors, be it Chicago and Northwest Indiana (I-65) or Fort Wayne, Anderson, Muncie, and Lansing (I-69). Interstate designation or not, having free flow to Kokomo, Plymouth, South Bend, and (eventually) Grand Rapids, will be a boon for those living along the corridor.
As a long-range, positive side effect, this could be a blueprint for how to do the same thing to US 30 from Valparaiso to Fort Wayne if and when that project is explored.