I think we don’t have to worry too much about the giant blue warehouse being seen (from tomorrowland that is). Most pictures of Shanghai Tron are taken from the upper level of tomorrowland. In MK guest will never come that high, so their sightlines will be much better in this regard. I can tell from personal experience that the tron ride looked AMAZING from shanghai Tomorrowlands lower level. And from that angle you couldn’t see the showbuilding because the little part you would have seen (behind the dip in the middle of the canopy) was themed with those white waves to hide it.
In MK they won’t do the upper level as shown in the concept art. They’ll go with the escalators. Too bad the US parks never do the different levels in a land anymore because I think thats what makes parks like tokyo Disneysea so beautiful. But people here don’t like stairs, so I’ll just have to let that one go.
It’s true that the showbuilding was visible from the higher level in Shanghai, but those different levels made Tomorrowland just soo beautiful over there.