After reducing the difficulty down to Immortal & fixing the AI's production bonus for that level in the xml, I've finally been able to survive into the Renaissance. (My current game is still ongoing.)
I have a couple questions/comments:
1) Wow, whatever you did to the AI is really, really impressive. In the non-modded game, I had gotten used to trying to survive until the early Renaissance, at which point I usually blew past the AI civs & started trying to maximize my end-game score and/or winning time. But in my current game, the AIs are actually able to keep up... they keep expanding, opportunistically attacking/conquering when they should, and (most importantly) gobbling up weaker civs. It looks like they're going to be competitive until at least the end of the Industrial Era. (Assuming I don't outright lose before then.) Very nice!
2) The wikipedia tooltip for the Commerce tree hasn't been updated for the mod, so when I finished the tree I got a totally unexpected surprise: an extra trade route. Yippee! BTW, I really dig all the various ways that you can pick up additional trade routes in this mod. The additional routes aren't freebies... you do have to work for them. But they're attainable and they do a good job rewarding different play choices.
3) Why did the Commerce policy Merchant Dynasties (15% off gold purchasing items) get buffed? (i.e. now it also grants culture when you buy stuff) I thought the Commerce tree was already the best mid-game tree for most strats, so why was the second-best policy in the tree made even better? I'm not complaining, exactly.... I'm certainly loving the additional culture in my current game. But I'm curious about why the change was made.