Yeah, with Test Track getting another update, the main thing left in the front half of the park to really fix (that isn't the Wonders Pavilion) is SSE and Imagination. Give both of those updates and you've essentially fully renovated the area formerly known as Future World, aside from WoL pavilion sitting empty. I will say the ending of Soarin' 100% NEEDS to be updated at Epcot once the hub is finished. Do a quick drone shot and change the edit.
Give WS another ride or two and Epcot would then really be feeling a lot more whole imo.