They could have demolished the central plaza, rebuilt the Fountain Of Nations in the actual center of the space as a circle instead of the oval that it was. Do the EPCOT Logo surrounding the fountain, then added landscaping and trees as is planned now. They could have saved Communicore West, re-programmed the attraction space into something amazing and necessary, still built the out of place Journey Of Water, and reconfigured the lake end of the building adding the stage area and outdoor plaza. The Meet and Greets could have been moved to the old Innoventions space and re-imagined completely into beautifully detailed permanent settings...micro-worlds for each character... which would be worth seeing even for those not as interested in Meet N Greets... The symmetry of the original design would have remained with beautiful plaza upgrades, Moana's Water Works would be pushed back into the space make it the actual corridor one passes through to reach World Nature or whatever it is called this week.
As we saw with the Communicore East building, stripping it back to it's original forms yielded a bright beautiful futuristic building... It would have in my opinion, been the best possible scenario and would have probably been cheaper in the long run.