In general play it would be fine if you allow players who tackle around the legs to be able to roll into marker position over the tackled player which I think should be allowed now. The disadvantage a good around the legs tackle allowing a quick play the ball needs to be cut from the game. A lot more smaller men would be able to defend in the line better.
Another great point, if you want to go back to the real historical genesis of this incident. When I first started watching league in 92, if a player tackled around the legs, he was allowed to come over the top of the tackled player to get to marker. The tackle took it's own natural time to complete, if you will.
At some stage (possibly the insanely fast pace of the game when superleague came around - although that pace of play did continue for several years without any huge change in defensive tactics) this became a penalty. There were no rule changes to facilitate this, just a change in interpretation.
Now if two defenders are in a tackle, invariably they will both be up high, to hold the ball runner up, slowing down the play the ball until a third man comes in to complete the tackle. This has lead to the third player in charging at the legs (McKinnon was also a victim of that, last year vs Souths) and the third player in lifting the legs.
Rather than the 10 metre rule or any other theory, I think this is the true reason for the increase in these types of tackles. In many ways it's an endorsement for this season's changes - if the game needs to be sped up, then do it via rule change, rather than by a change in interpretation.
Regardless, I don't think the game would lose anything by allowing tacklers to take their natural time to get back to marker. It's possibly to late to return to that now though, time wasting/wrestling tactics are too deeply ingrained.