I personally think juolevi should go to london this year, but I dont think it would be the worst idea to keep him if he earns à spot during training camp.
This situation is pretty similarto the hanifin situation of last year, an 18 year old drafted #5 who is big But not fully developped physically.
Carolina chose to play him and hé played 77 games, 22 points for a décent rookie year. I could see our OJ situation going either way, I guess its all up to OJ.