First of, let me preface my post by saying that nothing I'll write henceforth should be considered as any kind of pressure on Kostya to deliver a feature that only a subset of users (such as myself) need.
Second, I can explain why EWS push should be considered a higher priority over other EWS related tasks. Current version of application allows for scheduled sync as well as sync on events, which is quite suffucient for most users most of the time. There is however a case where this behavior is undesirable. I am, for example, accessing my corporate exchange server for email. Just like most corporate systems, our is set up with a password policy which expires passwords at regular intervals. When this happens, AM keeps trying to access the server with now invalid password which, in turn causes the Active Directory account to get locked. This has happened to me twice since switching to AM. I have used other apps for EWS that supported sync and can tell you that the worst that happens to those is they stop receiving mail until I edit the account settings and update my password.
