No it wouldn't.
Teams are coached to stack numbers defensively should both halves appear on one side of the field. It's why all teams play split halves, playing side by side made it too predictable as defensive sides could always tell which side of the ruck ball was going to.
That's assuming they'd have time to get into position. With a quick play the ball and a 90's style back-line maneuver I have a feeling it might catch a few sides out. It would be worth a try anyway.
The game has become so mechanical.
I'm really looking forward to the next phase of the game when coaches start trying something new. Atm it's just four flat hits at the advantage line. Then either kick or do a block play on the last.
That's why I get bored shitless watching most teams (Souths and Canterbury especially). There's so little spark.
Parramatta this year are fun to watch. You feel like the players have more input into what theyre doing rather than just mindlessly following orders.