I guess the completeness of the list depends on how granular your list is. For example we don't include 'Send Mail' on the list although infer it by saying two-way mail sync. To be honest it may be easier for you to just ask questions or send us your list. If you don't want to do that on a public forum you can email
sales@zimbra.com and one of our Sales Engineers can pick it up and help you understand what we have today, what's in 3.1, and an idea of what the roadmap looks like for releases later this year.