I like spending time on building up my roster, which includes setting a training regime, deciding when to sell and what to buy, and choosing the lineup for each game. I don't like spending time on micro-managing every single game or each individual player because, quite frankly, this shouldn't be necessary. I understand you'd like to twist this argument towards me being an evil (day)trader, but that's not going to fly.
What about having the AI take out your starters in the 4th quarter if your blowing a team out? Don't know if this is implemented.