There are valid reasons for using AGS.
If you don't have access to shore power and you are away and you have a pet inside the coach, then having the AGS enabled is reasonable based on HVAC needs.
If you don't have access to shore power and you are away and you are worried that you could drain the house batteries, then having the AGS enabled is reasonable based on power needs.
Also, I don't know which A/C units or control system is in your coach but my A/C units have a delay of several seconds bore they actually turn on when commanded to do so. Even if you turn them both on exactly at the same time, they do not start at the same time.
Perhaps the FireFly system has a time delay to prevent large demands for power at one time.
In any case, I'm not worried about using my AGS given how my coach is setup. I have plenty of time delay for generator warm-up and my A/C units won't immediately come on as soon as AC power is supplied to the coach even when there is a demand for cooling.
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