Good question! I think a lot of teams are going to have to figure this out, because we're seeing more and more highly skilled lefties, especially in the HS class of 2020. Duke has Dyson Williams and Brennan O'Neill, Cornell has Teat and C.J. Kirst (fr from Delbarton), UVA will have Cormier and a couple freshmen including former SU commit Maher, Maryland has Wisnauskas and Kelly (fr from Calvert Hall) and Koras (fr from Loyola), JHU has Williams and Grimes, OSU has Reid and Kane (fr from Hill Academy via Georgia). I'm wondering if we'll see more two man game on the lefty side from these teams. Typically in a motion offense you don't need two lefties, but to use a two man game on that side, you need two lefties. OSU has been doing that for awhile. I think we'll see JHU move to do that more. I'm curious if Pat March will do it more now that he has more lefties at his disposal. In 2020 he didn't have anyone besides Rehfuss, right? I expect Cornell to use that style a little bit. It will be interesting with Duke and Virginia, because they've run pretty traditional motion offenses. I don't know much about Maryland, but the guys they have are very talented, so they will want to get them on the field.
Edit re: Hiltz
As far as where Hiltz (or Tenaglia) plays, I think it can work with Hiltz getting runs as the 4th attackman and on the 2nd middie line. I think Rehfuss's heat would show him splitting his time behind the goal and below the goal, and Hiltz looks more comfortable above the goal, so they can probably make it work, especially if they play some two-man game. I wonder though if they both prefer the feeding role in a pick and roll scenario. Tenaglia also looks like he wants the ball in his stick.