Option for AI-suggestion mode
 

Instead of a straight choice between AI or Human manager, I'd love to see a third option, where AI could offer suggestions during the game, according to the predefined parameters, but the human manager is still makes the decision. AI pitching coach could suggest changing pitchers or getting someone up in the bullpen, for example. Or your AI Sabermetrics advisor could tell you what his analysis suggests.

They kinda already have a system in place similar to this when it comes to "trouble-makers" on your team.

I once received a personal message about a player on my roster pissing a lot of other players off because he was making it known "he didn't care whether the team won or lost games". It gave me three options... ignore it, release him, or suspend him for 5 games. I chose to suspend him, and a few days later, got another message saying the players were happy w/ my decision to take action.

Some type of "advice" system like this would be great when it comes to performance issues, though. For comparison's sake, MLB: The Show has it. When going to play a game and finalizing your lineup beforehand, sometimes you'll get a pop-up saying something along the lines of "So and so is only batting .130 against lefties this season. You should probably consider sitting him out."

Outside of trades, where your Assistant GM advises you, it does feel like the rest of your staff is largely voice-less. Giving them more of one could definitely help in a big way, especially when it comes to new players.