I don't mind taking a plus athlete rubber arm who can handle multiple roles and show he can stay healthy. An arm who can go 25 times in a season is a reliable option for matchups etc.
Penn State lowered his arm slot, so he now has sink and run. That type isn't going to miss a lot of bats, but typically doesn't allow bombs, either. You see that in the data as Horwat only allowed one HR this past season (which is very valuable in today's guerilla ball era) and only seven in 145.67 IP. I think he's a reliever who matches up with right handed hitters and one of the keys for a reliever is to not give up a lot of HR's if they're going to be leverage guys.
They have lowered his arm angle and he's added muscle to get his velocity to 92-93 mph in short bursts.
Is this a reliever that gets you to Omaha on his own? No, he's not that guy.
That said, the average middle reliever ERA in D1 is 7.17 and the average overall ERA in D1 is 6.48 last I pulled it. He's probably an above average bridge reliever who can go three times a week if you need him to and match up in certain situations. There's some value in a reliable type like that.