I played through the Ionian campaign today and I enjoyed it quite a bit
After the Homecoming objective was completed, the cities roads, mines, etc. that got transferred over to me in mainland Greece were acting strangely.
1. I could blockade my own roads. I'm not sure if it was just with the units I had shipped over from Ionia, but I could not select any of the roads in the Peloponnese.
2. the slaves in most(not all for some reason) had darker disks underneath them in the strategic view. They were the same color as a military unit would be, as opposed to the lighter grey of a slave or a worker.
3. the slaves mentioned in 2 cannot be put back into the mines once they are removed from the mines. they act like military units in that you can disband them in a city, but puts 0 recruits back into the city.
I have a savegame that exemplifies this if Rob or Rick wants me to send it along I can.