[MetroMPG]

This is a good idea.

More aggressive DFCO where light braking might be used also means you keep turning the alternator (vs. hitting your kill switch and feathering the brakes up to your a stop).

Splitting hairs, yes. But it may make sense for some drivers to add this to DFCO-equipped cars just to expand the "DFCO envelope".

(Note: the obvious option would be to just hold my ignition kill switch while leaving the car in gear and the engine turning. However, mine will soon throw a CEL, so that's not really ideal.)