So before anyone says that i am glad that KB got arrested, dismiss that thought. I am in no way glad our (disputed) most talented player on offense got arrested. What i may be happy for is a 3 game suspension, forcing KB off the field for a few more games.
I asked a physical therapist what the average time for an athlete to recover from an ACL/MCL tear and he told me 8 months to 1 year; usually closer to a year. A 3 game suspension will give him one full year to recover, and less of a chance to re-injure the same knee.
Any athlete is going to try to get onto the field as soon as possible, whether they 100% or not. That is why I would be ok with a little extra time for him to recover.