I don’t think projection mapping around world showcase would work. People want to view the lagoon not turn aroundTBH that would be the best outcome, it was pretty timeless and overall very well recieved.
I:ROE v2 would be great. Introduce projection mapping on every showcase building / monument, throw some on SSE, maybe add some drone lighting and you're done. I'd keep the globe and barge but maybe redesign it to be larger. I know theres hight limits on what can fit in the lagoon but theres ways around it (e.g have the globe sections fold down so they can fit under the bridge without needing to raise it).