Honestly, I like the idea of tearing everything down in Tomorrowland, with the exceptions of Space Mountain, the lagoon, and the Monorail (with Star Tours being preserved in Galaxy's Edge). Having a fresh slate to work with would be the best way to move forward with Tomorrowland. My bigger concern would be that Disney would create a generic, modernist Tomorrowland ala Shanghai Disneyland, lacking in any character, whimsy, or imagination. Tokyo's Tomorrowland is easily the pinnacle of Tomorrowland, with its multiple levels, science fantasy elements, and 1980's space aesthetic. Regrettably, Disney seems to think that style is not worthy of maintaining, given the redesign announced for Tokyo's Space Mountain.