OK, I've finished the GCS game I was running before I updated to v1.2.

The AI is definitely more aggressive. I've fought off more blockades and sieges in the past 4 hours than I have in the last 4 months. The sieges were actually using real armies. Unfortunately, the blockades were 1 or 2 severly depleted ship fleets. Does the AI send units for retraining? It would seem not.

The AI is using it's agents hard!!! I've had more spying missions than I know what to do with.

My main complaint is that you can't keep the city details open when clicking through the unit & city completion screens. It's very easy now to miss a city going into revolt because I have to explicitly click to open and close the city details. This is most definitely a step backward.