I have a question. I noticed if you allow the AI COO to manage your farms they don't seem to train passed level 5 or 6 so if you are allowing them to buy the best resources they will select a competitors farm because of the higher levels.
I would suggest maybe allowing the player to configure a section in the AI Details page about farm levels, because farming is the one are that quality matters and drives price and sales. This might also work for R&D, since the AI likes to change research once you are the leader, instead of just building onto your technology lead.
I also noticed my CEO Expertise is not changing (even though I left it at 8 months) if he manages farms the levels drop from 5 back down to 1 for all units. and he's not gaining experience when running farms, retail, mining or manufacturing
I'm on Year 2183 so alot of time to test this.