It looks like this thread died a long time ago, but many of us are still hoping for EAS support I'm sure. As users, few of us have any control over our organizations' choice of e-mail server. We just want to be able to use the app that we prefer (Aquamail) to get our mail.
Since Aquamail doesn't work for one of my four email addresses, I have no choice but to install and use the official Outlook app to get mail with that address, which is a shame.
Edit: Don't believe me? Look at the number of views this thread has received over the years.