Expansions should be improvements on the base game, you say. The whole point of them is that they're adding cool new stuff, and the same game with a bunch of cool new stuff added should always be better. Except often that isn't the case.
The list of add-ons that feel like they misunderstood what made the original good, or dragged it out unnecessarily, or were just sort of fine in a "second helping of the same meal" kind of way, is a long one.
