Would you be able to beat Diety if...

[The Great Apple]

I don't know if I could still beat Deity, with all those changes. But it sounds like fun to try. (Except for #5; the AI does still get a bonus from excess happiness, in the form of more frequent Golden Ages).

Of course it does. The value is a lot higher when you're on the happiness limit though. Better to spend your cash on something else to be honest.

 

[mzprox]

All those changes should be implemented, (about the horseman I'm not sure, it would be better if the Ai would have better defense against them) I hope they patch the game similary or there will be a mod which concentrates on this kind of stuff (instead of making total conversions and changing tile yields etc..)
To the question: I think it is still not enough. but winning on deity would be much harder.

 

[CornPlanter]

Standard map, 6 civs, standard speed => ~300 gold every 30 turns. 10 gold per turn. Not bad IMO. Ok you won't actually get this... maybe 7 GPT is more realistic, but still not bad!

I'd say the actual value is far bigger than gold sum divided by turn numbers You get all that 300 immediately and you are only 110 short of buying Horseman. Just from one trade. Buy horseman, rush someone, sell newly acquired resources + use loot money and buy more horseman, kill someone else, repeat... continent is yours so easily it's not even funny. You couldn't do it so easily if you get actual 7-10 GPT instead.