I don’t mind that idea at all. Jacks only issue is his goal kicking. He is strong and very good at outbodying opponents, plus his footy brain and knowing where to be could be huge assets in defence. Kemp is very good overhead so could play 3rd tall and take some heat away from Charlie & Big H.Agree. JSoS has about as much chance of playing defence as Kemp has of playing third tall forward.
There are a few who have advocated for Kemp going fwd and JSoS going backwards. Spitballing and amounts to the exact same thing.