Sims 4 Island Paradise: Expansion or Game Pack?

Anything would be bigger as an expansion pack, i'm sure some would vote Expansion for anything. For me this is one that should be a game pack. We just need a nice new holiday destination, a few new game play options and build/buy items. We already have two vacation destinations, i'd prefer the developers focused on something bigger than just a tropical vacation in an EP.

I'd be in favour of an EP for this if there were more than just a tropical island - i'd like a winter destination with winter activities and sports.