Why not introduce competition for the ball after the tackle as well
Perhaps have a competition for the all after a throw in, maybe introduce a couple of extra forwards.
I think if you did that, you might have a game.
Secondly, it could be dangerous if it were to become the done thing all of a sudden because RL props have been "bred" away from the requirements for front row play. Put it this way. Would you be happy to take a couple of randomly chosen RL props/hookers and drop them straight into the front row of an RU scrum at a similar age and playing level?
I do wonder at the mindset of someone who watches the current state of union scrums and then goes "you know what? we really need this in our game!" It smells of someone who agreed to write the column and then the deadline sneaked up on him and he was scratching around for something to fill the space. Which is a shame, because they have had some interesting ideas in there.
I've seen a few scrums won against the head and feed in league over recent seasons. You can only get away with it a couple of times a game with a coordinated shove but most teams never try it which I think is crazy when there is a real chance of surprising the opposition and winning back possession.
I've never had a scrum collapse when a team's decided to push. Keep in mind that in RL we are no where near as close to the ground when we scrummage, thus a lot less likely to not be able to support ourselves.