My method was not to remove the Go Coaster but to retheme it. I was also extending it by taking over the space that the Treehouse takes up.
Towards the front of Toon Town is Goofy's Playground and Donald's Boat. That's where I would replace those two with a sit-down character dining area and shop (but somehow keeping the actual house and boat).
Across the way where the walk-up dining areas are, cityhall, and Five & dime, i would replace those with two attractions. One could be a possible motion simulator, the other a straight forward darkride.
I think that's trading up, don't you think?