You're exactly right...that is a downside to this new layout. I was also concerned about speed (with a nested table being involved now and all) but the difference (if any) is negligible. I'll keep an eye on the formatting/syntax for the roundups as best I can for a few weeks and adjust as necessary. I think it'll work out fine once we get used to it.
So now, in addition to another news system, we need a Roundup Generator?
Actually wouldn't be too complicated...