I think IGG games can be a little dry, but it doesn't suck the skill out of the game. I used to really hate Minion when I was a relative noob, partly because they were so slow on BSW, partly because I would always look at a board, think, hey, here's a clever way to win without buying Minion!, and be wrong and lose to a boring minion strategy. I feel that way about IGG now.
I mean, look, contrast with envoy/big money. a really boring strategy, but I expect Geronimoo or WanderingWinder to win much more often than 50% against me when that's the dominant strategy on the board, purely based off of better intuitive knowledge of win to start buying duchies in these types of games.