As for some of the other suggestions, OFG's suggestions will actually hurt the ai, or at least won't provide enough benefit to turning it off. Having the rule 5 enabled will generally mean the player loses guys he's been able to stockpile (if any) to the ai, it actually improves ai teams rosters.
The ai won't make the decision to trade players solely on morale/personality. That's actually something a human is more likely to do
The intentional opaqueness of the personality system actually means that human managers won't have a full understanding of it and how it affects gameplay, while the ai probably does. So leaving it enabled probably actually provides the ai with a slight advantage.
Hiring the absolute best scouts and coaches doesn't provide nearly the value that people think it does, so the ai not grabbing them all up really doesn't matter that much, especially since the new coaching model doesn't clearly differentiate "best" coaches any longer.