Not sure what I'd want for GPs as I usually don't take much interest in them, especially the most recent ones. I really do still want hotels since they weren't added in Island Living, so a GP that adds hotels and maybe a new vacation world (hopefully another kind of tropical island) would be nice.
For a second GP, I'm not sure what I'd want. Most of the content I really desire need EPs to fully flesh them out. I guess something minor could be romance based things, with way more depth to weddings, a new attraction system that actually makes it so sims have a preferred type and won't flirt with out sims outside of that category, and new romantic interactions.