You didn't just make the point you think you did - the very fact that Morocco was considered when designing The Tower of Terror demonstrates the lengths to which they used to go to preserve the integrity of the parks. That we now have a massive blank warehouse towering over Future World is a testament to how far standards have fallen. The TRON show building will not be quite as intrusive, but it's the next worst thing when it comes to damaging the previously well-considered skyline of an existing park. It won't be visible from all points in the park, but it won't be disguised from many. Certainly the vistas from the Monorail and the Contemporary will also be forever changed, and not for the better. For a long time the worst you saw at MK was an errant roof from a high viewing angle, and a snippet of the Haunted Mansion show building if you knew where to look and were really looking.
I'm fine with TRON coming to Tomorrowland - I daresay I'm excited to ride it - but I won't pretend they're incorporating it into the park in a way that's up to the standards the company has set historically. Find me one part of the Splash Mountain show building that reveals itself from within the park - or even outside of it. The show building for TRON is a problem in Shanghai and evidence suggests they haven't taken to fixing it here.
You don't care about the great view of Cinderella Castle and the MK below from the top of Splash Mountain? That's meant to be part of the fun. Fine if you don't care, but it doesn't serve anything to dismiss those who do. I'd wager that most of us fell in love with the parks because of the choices made by the people who held projects to the highest standard they could rather than the choices made by the people who didn't. And these days Disney is capable of attaining higher standards than ever. They clearly went to great trouble building all that rockwork around Cars Land, Pandora, and Galaxy's Edge, so it's not like they can't show up when they want to.