Some things to think about,

If you go back to the carbureted era you would remember that when you chop the throttle on decel the mixture is going to be very rich, high vacuum and closed throttle plates.

Leaning out the mixture or even cutting fuel completely, decel enleanment, causes high engine braking.

The moment you step back on the throttle the extra fuel in the manifold might help the transition without having the mess with AE too much.

With my 7427 and Manual transmission decel enleanment is very noticeable. I can feel and hear the change when the injectors quit pulsing.