about the only issue I see with mag disconnect is a hasty and somewhat fumbled draw where its possible to drop the mag in the draw and lock up your gun when you need it the most ... when your hasty and fumbling.
I suppose it may be worth consideration when you have less experienced shooters in your equation who dont quite grasp the "cleared weapon" concept and believe dropping the mag = unloaded.
while untrue with or without mag disconnected it could keep someone from an extra and unintended orifice.

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it just needs more voltage