I'll bow to your superior knowledge De Facto. I don't actually own a flight sim program and only have around 15000 hours from mil fast jets to the B744, so I'm still learning. Now, admittedly, I didn't converse in tech speak but please enlighten me as to the errors in what I have written.
Why would you if the automatics are doing their job properly?
As you like to answer questions with questions: If this is the case and the automatics are doing their job properly, why disengage the A/T in manual flight once max thrust is set. Here's a clue; I've already given you the answer in my to Lucalaz. I'm not interested in why we leave it engaged, I'm interested in why why don't disengage it, as you would in manual flight.