ACLs usually take 9 months to be back to 100%.
Sometimes you have freaks like Adrian Peterson who do it in 6 months.
Covey's strength is his lateral quickness/agility which is the last thing to come back after an ACL. He will be about 8 months out when they play BYU.
Maybe he will be awesome, but more likely he will be good to play but he won't be quite as sharp and fast as before.