I agree that some of the late game wonders like Ruhr Valley and Colloseum are very useful. But have to disagree on Hanging Gardens. I never find growth rate a problem, rather cities grow so fast you're getting the -50% growth from housing a lot anyway, at which point the 15% are pointless. Also 15% is not a lot, so you're basically spending a LOT of early game hammers that are VERY useful early on. And you could always grab the +10% growth pantheon for a lower opportunity cost if you want instead. But sure, if you can grab it later in 3-4 turns, it's not bad.
But yeah, the Great Lighthouse is not so great either, I agree they should add "free lighthouse"
I built Huey Teocalli once, and it's VERY situational. But I think it's good to have wonders with more niche functions.