We are constantly adding, refining and even removing features. This is the best place to make your voice heard on what you'd like to see. You can also suggest new support documentation you'd like to see.
When hitting 'reply' to an incoming email shown in the stream, it is easy to overlook that the From address isn't necessarily set to the broadcaster to whom the incoming mail was addressed, which may cause a lot of confusion at the receipient's end. Would it be possible to always default to the broadcaster who was originally addressed?
Also, would it be possible to send our replies from "Broadcaster Name" <broadcastername@domain> rather than just broadcastername@domain?
A/B testing is not the only major functionality missing from NationBuilder emails, but it is a major one. Also valuable would be email open rates, tracking details, etc.
If those aren't on the roadmap, I would like to suggest as an alternative that you setup NationBuilder to be able to sync select People or Lists to MailChimp Lists, and other similar services. That way we can still run email campaigns with the tracking, monitoring, A/B testing, etc. functionality that NB is missing. In order for those to be an effective solution though, it would need to pull back into NB the stats, opening rates, etc. that MailChimp requires. And, also, all unsubscribes.
Dan, email open rates, click-throughs, donation stats per email and much more are available now. A/B testing is also available using the split functionality, and you can clone basic emails using the clone function. This questions is also addressed here - http://nationbuilder.com/nathanhjb/a_b_testing_for_email