As shown in the "way back when" video, there is room for a 6 4-buoy course on Lake Eola, possibly an 8-buoy overlap. From as far as I can tell, it should actually be easier to slalom there now because:
1. It'll be more into the middle of the lake. In 1986 the courses were located on the south shore, on the opposite side of the fountain.
2. Zero Off. Even with the relatively tight setup, the boat will be up to speed quicker. Back then it was all hand-driven by the likes of Les Todd, Ian Staples and the late Jack Walker.
It would be nice to have tricks there but, from the perspective of the organizers and the investors of the event, it would be a hard sell to have it in anything other than a exhibition capacity.