Here is another experienced commentator:
Shifting a Dog Ring Transmission - RX7Club.com
Sounds like he prefers automating the actual shift event (i.e. air shifter/kill circuit coordinator)
"Automated (semi automated). The movement of the dog ring is powered and the engine is cut / re-instated in a co-ordinated manner. Gear-shifts take milliseconds. This system produces zero dog wear when set up well. It is not applicable to most cars, but it illustrates that speed of shift is a good thing. "
main thing is shifting quickly. Other options have "built in" kill switch when you yank on the shifter, and of course the coordinate your right foot with your shifter hand approach which is the most risky especially with lots of horsepower.
But it has to be the most efficient way to shift also, there is no opportunity for slippage, which may be viewed as a nvh concern as the acceleration drops off in small steps instead of slipping between gears, but I'm more interested in efficiency and simplicity personally. If that is an nvh concern, you might as well argue which hand lotion is best at that point...