This pick up stabilizes the DL, because he adds depth & isn't being asked to be a starter though he could be.
A 4-man Edge rush rotation of Bain, Mesidor, Alston & Baron, is exactly what you push all your chips in the middle of the table for when you're in WIN NOW mode.
He's not being asked to come in & anchor the Strong side as the primary starter. His job (I suspect), will be to simply get the QB on pass rush downs. Pressure the pocket & disrupt rhythm, at probably around 35-40 snaps a game.
What I like most, is that last year was the best season of his career, which means he's steadily improved over his 4 years in college. And now this is money year, so his draft status is on the line & all he has to do is get to the QB. He fulfilled his role well playing next to James Pearce Jr last year, who will likely end up as top 5 pick in the 2025 draft. So in this situation, he can play a similar role, with reduced responsibilities & still have equal impact.
Unless he just ends up getting hurt & never plays...
But aside from that, it's a low risk, high reward add that gives us on paper, one of the best DLines in the ACC.