I agree (mostly). Here's my proposal:

https://gitlab.com/bshanks/sdver

{marketing}v{major}.{patch}

that is, there is no longer any number which distinguishes (non-breaking changes which add API) functionality from (non-breaking changes which do not).

The other main change in my proposal is a restriction of all numbers to be less than 32768, and a restriction of the length of strings. This allows compliant implementations to use fixed-size variable types.