Our pages look good, thanks for approaching this with care!
The only concern I have is the 5120 character limit, which was previously uncapped for jam pages. I know this is now consistent with profile and project pages, but I imagine that change will break many more jam templates than other changes this update has made!
Hosts may not even realize they're over that limit until they try making an update, and their now "squatted" character count will be revealed as a violation...
Is there a chance that your team would be willing (or able) to uncap the CSS character limit for jam pages?
Otherwise, I know I have a lot of unexpected cleanup and consolidation/style-sacrifice work to do...