I've always thought Rubio was underrated as well. Prior to trading Rondo for Crowder + draft pick (which ended up working out better) I was always hoping the C's would trade Rondo for Rubio.
If I was the T'Wolves I'd hang on to Ricky and see how the chemistry with Butler works. Maybe sign an FA like Patty Mills to bring shooting off the bench to spread the floor more when Rubio is out of the game.
Rubio might be good in Detroit, but I don't know why MIN would want to take back Reggie Jackson.