With the speed of the game increasing and the top teams emerging, a theoey I'm playing with is the second rowers, 11,12, and 13 are playing an over sized role in the game at the moment. The base of the theory it is the second rowers are required make dominant tackles and slow the ruck more than anyone, and they have to have enough speed to scramble and shut down the edge runner exploiting the space.
Looking at the top teams
Sharks
Nikora / Wilton / McInnes
Panthers
Garner / Martin / Yeo
Storm
Blore / Katoa / Loiero
Dolphins
Kaufusi / Aitken / Plath
Conversely
Tigers have the worst 2nd row, with Warriors and Rabbits close behind. The outlier is the Titans, but now Fafita/Fermor/Hass are together, they are starting to win. Anyway I could be completely wrong and talking shit, but let me know what you think.