> 1. Is it intentional that there is no section on content encryption > algorithms for MUSTs?
Yes. From the beginning, the model for this draft was RFC 2633. We dealt with this only in the "options" for CMS, and what it says has crept in through various comments.
I would be content to say nothing about algorithms in WRAP, and leave the topic to CMS (Son-of-CMS). However, I don't think the division is easy to make cleanly.
[JLS] With the most recent change of omitting algorithms from CMS, this section is now required both here and in the message draft.