Are you sure that Bitcoin Core contributor(s) didn't write or help write Citrea's whitepaper?
No, but I would be surprised.
"Put it on paper and we will get it pushed live" type of deal. Because it is absolutely giving that vibe.
The whole point of their paper is that they can do exactly what they want without making any changes. They literally describe what they want to do, why they can't do it in just OP_RETURN, and what they are going to do to work around it. I didn't see anything about asking for a change to the network rules or that they were expecting network rules to change. AFAICT, even with the limit removed, they may not change their construction to use a single OP_RETURN although it seems like they are open to that idea.