At his pro day JOK was a bit over 6'1, which is fine, but he weighed 221 lbs. I would like to see JOK play at 230-235lbs. I dont think 9-14 lbs of muscle is a big deal. At 216lbs he would be very undersized for the box. Adams dosnt take on blockers nearly as often as a linebacker, size helps with the punishment. That said, I dont see any reason JOK doesnt get there in a couple of years, no reason he isnt 225lbs+ by opening day. 4 lbs of muscle can easily happen by then.
But funny you mention Jamal Adams, a very athletic 6th overall safety. Adams had a 20 yard dash at 4.13, JOK 4.12. Adams 3 cone was 6.96, JOK's was an insane 6.81 3 cone. Allot to be excited about with JOK, but he needs to add some weight to play LB and the fact he added 5lbs for his pro day is proof he knows that, so i am not worried.