Think that's going to take a lot of work, considering that a lot of Techs and Civics will also be adjusted to the new improvement system. Wouldn't mind it either though.
Little note: when I check the "Compacted world" or something option (disallow Mercurians & Infernals), I always get Hyborem's "Sup you guys, someone summoned me so I'll be destroying stuff 'n thangz, aight?" message at a quite early point, long before his actual summoning is plausible.
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And would it be possible to have an option to allow Houses without the city-stealing nonsense? One of my last games was a Doviello game where I had such luck at the start that I simply dominated the game in barely any effort, but I kept losing my 2nd best city to one of the Houses. Every time I reclaimed it, it would be re-converted on the next turn. Of course, I had built a lot of +Support buildings for that (and nearly every other) House, as I assumed this would be a good thing.
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Woops, just read some info on Houses in another topic. Should load one of the saves and check the Support rating of the city-stealing house. Thought it was high, but I might have been neglecting one. :/
I did get all the "Will you incorporate?" popups in a single turn though, right after capturing a city. What's up with that?