I don't like the idea of binary other than to throw lead as quickly as I can wiggle my booger hook. That said, it's the operation of it. If you decide after squeezing the trigger that you don't want the next round going downrange, you have to hold the trigger to the rear and make a conscious effort to flip the selector from binary to semi or safe, then release the trigger. It doesn't seem like much till you tell yourself to do it. I believe both FA and Echo both run off the same procedure.
One that has caught my attention, is this forced reset trigger. It does require a full auto bolt carrier, but most are now equipped that way anyway.
FRT - 15 Customized Firearm Trigger
www.rarebreedtriggers.com
I've been on the waitlist. Its pricey, but I think its pretty sharp.