I'd be happy even if just one or two lots per vacation world were made residential. Technically it might be fine to make one hood residential, while the deep jungle access hood of Selvadorada and the deep forest of Granite Falls stay as they are.
Modders made it possible to reside in Selvadorada, so I don't see why it should be a big job for EA to make the same change.
About mountain climbing and hiking trails, they were both features of other packs, and I don't mind them staying that way. I like to have unique reasons for visiting/playing each world, rather than "all" features being made BG free. If making a JA refresh there could be added some sightseeing tour etc though, maybe a NPC guide leading a small group into the first few levels of the jungle, or even just walking in the open hoods, too. Might be harder relating to original community lots though, as many of us do change the lot content over time.
