First I have to say that I real love this modmod. I tried many but apart from some OOS-problems I did not see many things that really disturbed me.
One thing occurred me. Why is engineering corps a national wonder? I don't consider it as broken that several of them would be imbalanced.
That's my suggestion: Make engineering corps a normal building that can be built by a great general AND that can be build without a great general by defensive leaders (Logic probably suggests Industrious but this trait is quite good already). Would strengthen an otherwise very weak trait by offering a good defense against fireballs.
One thing occurred me. Why is engineering corps a national wonder? I don't consider it as broken that several of them would be imbalanced.
That's my suggestion: Make engineering corps a normal building that can be built by a great general AND that can be build without a great general by defensive leaders (Logic probably suggests Industrious but this trait is quite good already). Would strengthen an otherwise very weak trait by offering a good defense against fireballs.