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Above suggestions look great.  Also something that links SEO with the rest of marketing strategy.

2 on my team - we do mostly audits, with a portion of time also devoted to client training and related consulting.  Most of our clients (all the way up to some of the biggest sites imaginable), only have one to a few people on their in-house teams.

I have recently had a client ask about these metrics. After explaining that the numbers are just being used to compare them with competitors, I usually begin to explain the types of actionable items that influence authority and trust. I think most of us could do a better job explaining what it is that we do as well as why were doing it.