The Problem I am having with 4.4 and WP Engine is:

One the setting are copied over to the staging server and the staging server doesn't have the certificate so it give you a warning. Which you can override and then you hit another error in a redirect loop which results in an error.

So this had rendered my staging server for my online store inoperable.

(Yes WP Engine I am contacting support)

But oh my this is a bit of problem for those who like to test stuff before they update.