I understand that, but the canopy could have easily faced Tomorrowland at the same angle as Shanghai without causing complications unless something unknown to me is the culprit. With this design the canopy is less visible from the land, the show building is partially unhidden from the Speedway and entirely unhidden from Toontown.
The only logical reason I see to this design is a longterm plan to build out attractions atop the existing speedway that could easily be positioned to block the Tron show building. Had Tron been positioned parallel with the speedway it would prevent an attraction from being placed there.
This insane plan would also call for longterm thought placed into the future buildout of the Storybook Circus area.
I am not saying Imagineers do not think that long term, but I do not see the expansion that would justify Tron's placement happening in the next decade. At that point is it really even justifiable to leave an eyesore like that?
I made a mockup of a Tomorrowland overhaul for fun a while back, only relevant for demonstrating what I am saying. Putting it in a spoiler so it isn't that big.
I really do not see the benefit of building Tron this way.