I look at it as 2 D tickets. The dark ride portion can't possibly be considered as an E ticket. It is half the length of NRJ, a ride Disney wouldn't even say is an E. The AAs have very little motion. Some are on platforms that spin and move, but they at most have 1 or 2 points of mouth motion, then projected eyes, and some projected mouths. It's a neat section, but not an E ticket.
Then you line up for the second section. The outside race. Completely different ride experience. Is it an E on it's own? No way.
Combined, with the massive money on the rock work, it's an E in total. But that is the crazy part. Take the ride, but have the race section in a desert setting, and it wouldn't be an E ticket. I like rides that are E worthy due to ride action, not 50 million dollars worth of fake rocks.
If the MK spent 100 million to totally amp up the theming around the existing Speedway, no ride changes, would it become an E ticket? Mostly static theming, and a few light up, simple AAs?
Many Disney "E" tickets are becoming that. GotG looks like a true E, but Tron is a low end, unpopular, coaster system with a very simple layout. Put half of it in a neon filled building that uses absolutely NO visuals from TRON other than the ride vehicles, and suddenly it's an E ticket. It would be like the Hagrid coaster not having ANY of the AAs, and a non canon Hut to ride through.
Again, that's all Disney has to do. They dont have to add Recognizers, Bit, and the MPU. And no need for a Tron AA anywhere. They can just do the minimum, and know FP÷s will be impossible to get for years.