This is great and all--and cheers to HTTPS Everywhere fans throughout this thread, but none of you are answering the question "can I uninstall HTTPS Everywhere now as a result of this feature shipping?"
Do you want the most HTTPS connections you can get with almost no chance of inconvenience? Then use HTTPS Everywhere in the default mode. If you don't mind seeing that you are about to connect to a HTTP site and click ok if you want to contine then yes, you can get rid of HTTPS Everywhere. In this case you will get occaional shocks like "Why is my bank's website giving me a HTTP only warning? Oh, it is because there is a HTTP only redirect to the www domain."