No way he is still a 1st rounder after an ACL tear
Obviously things can change over the next year from a production standpoint and cause his draft stock to fall, but an ACL tear is far from an indictment on being a first round pick - this year alone:
Caleb Farley was picked 22nd this year with an ACL tear and multiple back surgeries.
Landon Dickerson was picked 37th after two ACL surgeries and two ankle surgeries. (Yes, I know it's not the first round, but it's five picks into the second round and he plays a non-premium position, so very few centers are drafted that high)
Other notable (non-acl tear injuries):
Jaelen Phillips, who is like one concussion away from having to retire, was picked 18th.
Greg Newsome missed 20 games his first frosh and soph year due to various injuries before being drafted 26th after his junior season.
While not ACLs, there's plenty of other first round picks in this draft class that had season-ending injuries (fractured ankle/feet), heck some didn't even play last year due to opt-outs.
Point is, if you're talented enough, injury history does not prevent you from being a first round pick.