I'm honestly kind of surprised that there is a disagreement on this. I know that everyone has their own opinion and all, but the difference between an E-ticket and D-ticket attraction should be pretty discernible.
Expedition Everest - E
Tower of Terror - E
Splash Mountain - E
Forbidden Journey - E
That's just to name a few that quickly came to mind. I think its safe to say that, while the new SDMT may be a great attraction, it is not going to be on the level of those named above. And while I acknowledge that I have obviously not experienced the attraction yet, I am saying that based off of what we have seen directly from Disney.