There has only been a short time between the end of one season and the beginning of the next, some players had the luxury of a break, whilst others were on International duty, so it makes sense that Harris rotates the squad to keep things fresh.
Pack played well in the last two games, but in the game on Wednesday he wasn't involved half as much, and probably needs to be on the bench this Saturday
I hope Glatzel comes good as we can't expect Moore to play the Centre forward role with 8 out 10 performances week in week out.
Joel Bagan did enough to keep the shirt for Saturday and if that means Bennett gets more time to fully recover it's a bonus in my view
Ideally a front four of Murphy, Tomlin, Wilson and Moore should in theory rip defences apart, but I doubt will see 30 + games with that line up