I agree that if you are waiting for Gawn your R2 at least has to be productive.
Is Ceglar just for insurance or do you think he can average 90+ without missing many games?
Ceglar is insurance but also flexibility that I think you couldn't execute this plan without.
Suppose your rookie ruck is ready to cull and there's a good rookie elsewhere on the bubble. Having an R/F means you can make the trade without having to factor in getting Gawn that week as well, which is essential in my opinion. The insurance is a bonus.
I think as a solo ruck Ceglar averages 85-90, best case 90-95. People might say "why bother then?" but I would be banking on a rookie ruck outscoring the forward rookie you would have instead on field.
However, I've just read that Kreuzer is expected to play Marsh 2, and is supposedly over his heart issues so this may be shot anyway.