I like all of those options, but I tend to be kinda picky on what I use when playing vs. the CPU. I'm pretty sure I've never seen it use either of those options no matter how long a pitcher warms up for, so I don't really use them either. And I have seen the CPU bring in a pitcher completely cold before, too (it's kind of obvious in quick game mode because they'll come in with significantly less than a full green bar of stamina).
It's basically just dumbing down my own game to match the AI's capabilities, but I feel like it's the only fair thing to do. YMMV