We've kicked off a mailing list and monthly phone call at 11 AM PT today to discuss revisions.
If you have views about how the architecture should change, please participate on the cncf-reference-architecture@... and the call. (And if you reply to the message, please remove cncf-toc@... from the response.) Any outputs from this effort would then go for a vote to the full TOC.
Topic: CNCF Reference Architecture
Time: Every month on the Second Wednesday, 11:00 AM Pacific Time (US and Canada)