Something about their attacking patterns allows a loose forward to stay in the far 5m channel for support. Often it has been Fardy (I think because he has about as much impact as a feather in attacking breakdowns) Higs would be far more effective out there, and now that we have some purely dominant big bodies in coleman and timani, the flanks can play to their strengths.
Only thing we will see is a reduction in turning over opposition ball, however we can either choose to crush and destroy the breakdowns like england with monster muscles, or simply make a tackles then realign the defensive line without committing to the breakdown, ensuring that each individual tackle is effective and halts momentum.
Unfortunately when it was simmons, horwill, carter, mccalman, fardy etc, noone had the ability to own the space at the breakdown, therefore couldn't afford even 1 forward hanging out and about and when tackling, they would always surrender meters to bigger opposition forwards 1 by 1.