This looks like good progress. A few very specific comments below:

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I see phrase:
"   Because QoS is out of scope of TAPS, this document assumes a "best
   effort" service model [RFC5290], [RFC7305].  "

I'm not sure we need to state this. Although I agree that TAPS will not propose new QoS techniques, the service provided by TAPS is, I think, also not confinded to "best effort".

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I am not sure that IP options from UDP are entirely automatbale. Per-packet IP options could be related to application use of the network, and I think this would require some form of API interaction.

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I see LE service as something interesting, yet this does not exactly fit the rest of the draft. The cited reference is to a DiffServ PHB, and the LEDBAT referenced is a transport protocol mechanism, not a protocol. I'm not sure this inclusion is justified in the current tetx.
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Abort without delivering...

Abortis currently specified for SCTP and TCP. If one assumes the bound semantics for UDP(Lite) this also seems also the correct primitive for UDP(Lite.

Should this ID specify a connect primitive also for bound use of UDP(Lite)?

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What should be said about SCTP usage of IP OPTIONS? I would have expected if the endpoint network layer set these, they would also work for SCTP?

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Finally,

I think I can agree the argument that UDP(Lite) message handling is different to SCTP.

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Gorry

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