I took a quick look at this draft and IMO it is unnecessary, for two
reasons:

1. There is already no requirement that you have an explicit nonce. RFC5246
merely requires that you specify the length of the explicit nonce, but that
length can be 0, as it is in the ChaCha/Poly drafts. So, rather than build
an extension it would be better to just define a new cipher suite if you
think
this is important.

2. TLS 1.3 already omits the explicit nonce entirely.

-Ekr
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