Abomination of random elements? The only random aspect of them is the Barbarian conversion rate, which is now at 67%. I agree that the late game UU is a bit of a detriment, but it's a pretty strong unit that's on a fairly useful upgrade path. While I don't think the Hanse is the best UB, it's certainly powerful and in the top tier. 5% production increase per CS trade route really adds up. Combine it with Patronage and Freedom and you have some powerful City-State trade routes.