Are Yeo and Cartwright that small? Manu isn't huge himself, he's just overweight.
Could we see Idris and Yeo swapping positions? Not that there is a huge difference between each, but maybe this will give Idris a bit more freedom.
Sika Manu - 110kg
Sam McKendry - 110kh
Jeremy Latimore - 109kg
Brent Kite - 105kg
Bryce Cartwright - 106kg (wow, thought he looked around 100kg)
Nigel Plum - 104kg
Elijah Taylor - 102kg
Isaah Yeo - 100kg
Lewis Brown - 98kg
Tyrone Peachey - 95kg
Adam Docker - 91kg
Backs that have more weight to throw around then Docker:
Jamal Idris - 120kg
Dean Whare - 96kg
Josh Mansour - 96kg
Jamie Soward - 93kg
Kevin Naiqama - 93kg
David Simmons - 93kg
Dallin Watene-Zelezniak - 92kg
The only players in our side that are lighter then Adam Docker are Matt Moylan at 90kg, Peter Wallace at 83kg and James Segeyaro at 84kg.
We do have more size in Yeo then Cartwright then I would have guessed by looking at them. But Docker is simply too small for a forward pack that lacks size in the second row as it is. When you have a second rower that is lighter then most of your backline and is about as effective as you would expect a bloke of his size to be, you don't drop your only monster second rower.
Docker needs to add some size and change his technique. Going for big hits in every tackle is just not effective and while it looks great when he stops a 20kg heavier player in his tracks, it's not so great when he bounces off a tackle or misses altogether and allows an offload.