Just my very subjective one. I've never ridden it, so my opinion is limited in terms of what I can judge, but it doesn't look like a ride that I'd put on the same level as Tower of Terror, or Splash Mountain, or American Adventure. I guess one could argue that the tech puts it up there, but the ride doesn't (to me) seem to be aimed at being a headliner. For me, an E-ticket is the ride you put on the guide map, and a ride that one would tell their friends to experience if they could only do one ride or show at a park. Rat doesn't seem to be shooting for that title to me.
I don't think that's a bad thing, though. I don't think Epcot needs a high-capacity E-ticket right now. It just needs to fix all of the ones it already has towards the front of the park, and some fun new attractions on the scale and quality levels of Ratatouille and Frozen (although in my ideal world they'd be free of IP, but who are we kidding at this point) throughout the World Showcase.