I was up Cowley last night watching the kids train and they spent a good 3 mins on wrestling and a good 30 mins on 3 in the tackle and this was at u13s level.

If this 3 man slowing down the tackle and play the ball becomes the norm then that for me might mean jacking it in watching rugby league.
We'll just end up with boring rugby with lots of players injured watching the game from the stands.
If teenage kids are being coached this way then I can't see enough players coming through and physically developing the right way. At 13 years of age bones, tendons and ligaments are not fully developed, wrestling one on one is OK but when you get 3 players on 1 player at whatever age.....something is going to go wrong.

It's bringing a system in that runs thru the kids up to 19s and then into first grade.

There's an argument that getting kids playing against set defences where the tackle has been controlled can help develop better halfbacks and ball players because they can't really on quick plays and must be more skillful to break down the opposition. So it could have benefits as well as drawbacks.

The biggest problem is the flat attacks and quick defensive line speeds meaning its a forward battle up to the 5th tackle for most teams then a tactical kick by the half backs, you can get quick ball out wide when defences tire but that doesn,t happen frequent enough.
Quicker play the balls means you,ve got more open play for half backs to work with in support play and direction options instead of facing a long line of set defence with little gaps to target.
For the last 5 years with flat attacks and quick defences to slow the game down we have not produced any half backs at all.

The current half backs are getting hammered this season, sometimes the defence gets a 20 sec rest with the wrestle tackle giving them a short period to recovery, if this was only a 5 sec recovery period then by the 3rd tackle there are going to be some tired legs out there for the half backs to exploit.