That's vanilla Civ 4 behaviour. We didn't change anything there (nor do I know how to, really).
Is there a way to tune the probabilities then? For example, lower the chance to get caught while moving or standing on a tile but increase the chance to fail the espionage missions.
Well... Do you really trust AI to decide whenever is one or the other appropriate? Or will it lead to an even more misguided AI? We try to not add anything with potential to further screw up the AI ability.
I've already noticed that AI "builds" local crafts, research and culture. And it seems that AI does that when all other possible things are built. So this logic could be used with the proposed buildings. Another problem I see here though is that AI tends to abort production which in this case would be a huge waste.
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I've installed SVN version (WC revision 4930 if I get it right) and played till the late medieval era. First of all I wanted to say that I liked the mines revamp, craftsman idea, grouping units into more logical and specialized upgrade trees, techs and civics tuning as well as scientists' great works.
And here are the things I want to discuss.
1) Unit cost increase
I think this is great. It encourages to build diverse armies and makes it harder to have a lot of units. But this change leads to strange situations. For example, I had only two 7
cataphracts and the next 9
medium cavalty cost less! I would like to resolve this by increasing costs of all units in the upgrade tree not only the ones I have and can build.
The other thing is I don't like that no resource units (those produced like workers and settlers) also become more expensive. Much more expensive. Aren't they supposed to be the bulk of the armies? For example shouldn't they soften the enemy stacks so that more valuable units had greater chances to win? Please remove the increased costs for this type of units.
2) Kitab-i Bahriye science work
It's ability is Free Sentry promotion for units built in this city. I didn't check everything but not all types of units recieve the promotion. The
Sentry link leads to ranged mounted and helicopter units promotion but the description of the work suggests that the promotion is for water units. Can you clear this please?
3) Some converter buildings give additional bonuses and some don't. For example, brick factory just makes stone out of coal but cotton mill also gives some
and a free craftsman. How do you decide which converter buildings should have a bonus?
4) Some civics are still weaker. Monarchy is totally useless, Caste System has a pretty heavy drawback, paganism can't be played to its most potential due to early world wonders, and you nerfed pagan temples, though it's an early civic so it's more or less ok.
5) I also have some observations and thoughts about AI behaviour but I don't think I could tell you anything new.