Thanks for doing that. It is also about making sure crates are following the two serde guidelines: that types that might reasonably be included in a serialized data structure implement the traits, and that the crate uses a "serde" cfg. Doing so for the crates in this list and the top X crates, and then maybe issuing a report about the state of serdification would be a great use of time.
The biggest kind of help needed right now is actually doing regular cargobomb runs against beta and nightly, and triaging the results; and doing cargobomb runs for 'needs-crater' PRs - there's a lot of angst in the lang team recently that crater is hopelessly broken and nobody is available to do crater/cargobomb testing. I probably need to write up how to do cargobomb runs and cargobomb triage, and then solicit a team to do them.
But also cargobomb needs ongoing development to support more use cases, to be more convenient, and to be distributed. There's no roadmap currently, and there's leadership needed here. @tom.prince has been doing a lot of architectural work and cleanup, but more is needed.