Yes I have an idea.
I think your expectations are too high if you consider it "unplayable".
Granted, there are far too many bugs for my liking, but the overall mod is still highly playable.
Add to that the great work in making this mod compatible with CSD and now fully compatible with EUI and I think you may understand the work involved.
If you haven't yet tried that combo, please do.
CEP + CSD + EUI beta = fantastic
I probably over dramatized my earlier comment of unplayable and I apologize. My comment wasn't about the project itself, it was more on what I was experiencing in my games. I still haven't figured out what was causing the problems I was seeing.
1. Food production in cities not adding up right and cities either not growing at all or taking forever to grow.
2. Gold not adding up correctly - showing positive gold income and actually losing gold after ending the turn.
These were the two biggest issues that brought on my earlier comment.
I still don't know what was causing the issues but in my current game I'm not really experiencing any major problems.
I spent most of the day trying different combinations of the MODs I like using and like I said I don't know what I really did to correct the problem.
My normal MODs:
1. CEP
2. EUI - this is the v1.16 beta that bc1 put out.
3. A simple 2UPT - that I have used since almost day one and has never conflicted with any other MODs.
4. Calypso's Colored Religious Icons
5. UI for Unit Stacking
The last thing I did was re-downloaded the first two listed above and started again with a cleared cache and moduserdata. After doing this the game seems to be running smoothly now.
The only other MOD that also seemed to cause problems was the Smart AI (v2) that I recently was trying out. It has some great features, but there was certain Civ's that just wouldn't expand - the one I noticed the most was Spain even at turn 100ish she would only have one city unless she had taken a city state. I'm not sure that was causing my other problems or not, but I'm not using it on my current game and I'm not having any problems on.
Once again sorry for my earlier comment. I have been playing with one version or other of this MOD since Thal started producing it. I can't hardly play CivV without the MOD. I will try other things out at times and I can't hardly get out of the classical era before I return using this MOD. If a MOD doesn't work with this one then I just want use it.