I wouldn't mind game packs having tiny worlds like Forgotten Hollow if it means we get gameplay that's new, innovative, and fun like we got with the Vampires game pack. But lately packs like Realm of Magic have super pretty worlds but a bunch of recycled gameplay. That pack had a few new animations, but most of the spells and potions are re-skins of gameplay we could get from either the science career or aspiration rewards.
For expansion packs, I expect both a beautiful world AND good gameplay. Island Living is a joke. They need to quit putting style over substance with the smaller packs, and with EPs costing the same as a brand new AAA game, they should be a lot better than they are.