I agree this could be a great way to go, and would allow you to have a "high-power"-style rapid descent from apogee and still have a safe and gentle landing, all in a low-power model rocket. Sounds excellent, especially for those of us that live in windy parts of the country.
But-
Correct me if I'm wrong, but wouldn't this approach also require a second ejection charge (not built into a motor) and the use of loose gunpowder? It would seem that if I purchase commercially-made black powder to use for this purpose, I am buying a low explosive. And the igniters that go between the electronic controls and the black powder also currently require permits and licenses. This moves me into the wonderful world of LEUPs, local fire marshals, records paperwork, storage lockers, random inspections, and all the other craziness that turns low-power model rocketry (relatively "care free") into a whole different animal (a cosmic-sized hemorrhoid?).
OTOH, if one of our electronics vendors sold small packages (1 gram?) of black powder ejection charges to use with the electronic controls, and an igniter that was matched with the electronics, then it seems that it would all fall into the legal loophole of "model rocket" product, designed as an integrated system from a single vendor, that does not require all the LEUP nonsense. So I have to wonder, why haven't any of the electronics vendors taken this additional step? (It would make ownership and use of secondary ejection systems much simpler and easier, and sales would probably increase.)
The only existing complete system like this that I know of is from AeroTech, and nothing against them, but their system is kinda big and relatively heavy (oriented toward high-power rocketry) and kinda pricey, at least compared to low-power rocketry in general. Surely someone could come up with an equivalent-function-and-appropriately-priced product for low-power??? I'm not in the "timer electronics business" but it seems to me that the timer would be the "hard" part, and several vendors have that done already.
And all my rambling is off-thread, so if we're going to discuss this idea we should probably start a new one-