I could see what @ldslaron is getting at as being a benefit. 2 weeks ago my system went offline and so I flat lined for 2 days.
My system watered for 2 days straight afterwards at it's normal watering, but technically, since it was at 0 (50% AD for me) for a couple days, my water balance isn't correct going forward in relation to where it was at before the flat line.
I say this. I don't want my system watering longer the next day to catch up, since my settings are dialed in for my correct soil and root depth. I don't need standing water. I would think the easiest bet is to take the negative moisture balance and just add to that and let the system catch up.