Jackson's really still finding his way in the game, particularly the ruck craft aspect of it. Can take a while to bed that down even for the most prodigious of them.Jackson looked great the first 2 games but has steadily declined since, being the number one ruck isn’t good for his game overall. Agree on Treacy actually looking better when he gets up the ground more, but he could do that with Darcy/Reidy as the main ruck, I’d be tempted to give Jackson a full game in the forward line to try and get his touch back, dude looks spent and his timing is way off.
Taking the majority of ruck contests is fine as that what the team needs. I reckon he should take the pressure off himself to win the ruck contests in the air though and instead look just to disrupt the other ruck and focus on winning it when it hits the ground.