Our defense went worse without Sandow-Sometimes the best for of defense is attack.
When another team knows your attack is useless(with kelly) there happy to throw the ball around knowing that if turn over possesion they will be able to defend us.
When Sandow is there i think teams are a little more reserved due to Sandow's attack.(its 10x better than Kellys)
On balance I think Kelly will suit the team better in attack (assuming all are fit, if not this may change the scenario).
It almost guaranteed that Norman, Hayne and Hoppa will be in the team at full fitness and looking at them.
Norman - Good long kicking game, good running game, good passing game especially short. Questionable short kicking game, inconsistent at best and need work.
Hayne - good long kicking game, great running and passing game. needs work on his short kicking game but really should be on the end of them rather regularly providing them.
Hoppa - Good running and passing game. unknown kicking skills.
So looking at this we need somone who can provide early ball to Norman and Hayne and provide a good short kicking game and someone who can be relied on to long if required.
Now I think Norman is a better distributor of the ball, he gives good early crisp ball and generally goes the right way but he doesn't create chances because his running game is nothing special. He is not a final pass kind of player rather provides opportunity for others. On his kicking game his long kicking game is average and should not be relied on solely but he is capable of kicking long if required. His short kicking game is average and can be improved but is much better then sandows IMO.
Sandow is more of a runner, he creates chances by his running game but his passing game is actually pretty poor and he doesn't have a good long pass which can make him predictable. His long kicking game is the best Kelly and Normans but his kicking is also selfish and he will regularly go for 40/20s or chip kicks which are amazing when they come off but put you on the back foot if they go wrong.
So realistically a Sandow-Norman halves pairing would be pretty incompatible IMO and the option should be a Kelly-Norman or Kelly-Sandow pairing and I think Norman has more to offer the team then Sandow. The Other alternative is a Norman-Hayne halves pairing but Hoppa is an unknown in the kicking department and it may be to many runners between the 3 positions.