Sorry to triple post - I just tried a more extreme way:

- All buildings take exactly 1 turn
- All recruit time halfed. To be more specific: 1 turn -> 0 turn, 2 turns -> 1 turn.

I agained fired up a Carthagian Vh/Vh campaign to see the effect. I was wondering whether the AI will now spend all their funds every turn. That is not true. Their treasury size accumulated like before, yet I found them now build way faster than vanilla.

For example, when I took Brutii's Tarentum in turn 3, it is almost completed with everything it can build, same is true for Scipii's Messena in turn 4 and Capua in turn 5. The Roman AI also field good sized army right from the start. I enjoy smashing down a lot of useless military buildings for extra income.

Military wise the AI seems also very competent. Due to its money cheating ability, the AI, as long as not terribly in debt, is now able to train better units from advanced military buildings, developing its quality power early on. However, I am not sure the AI knows they can train multiple units in 1 turn. I haven't been rich enough to do this except for emergency peasant garrison purpose.

The game after this mod again gives more variety and challenge. It is very fun!