At the end of the day, it is pretty simple from where I stand.
I think that there are naturally going to be discrepancies in the sensitivity of the blocks due to the difference in brands, materials used, size, environmental impacts, and heightened reactivity in pressure situations. With that being said, it is important that there be room built in regarding the allowable reaction time. It has been stated previously that the powers that be had already admitted the possibility of reaction times being under the .100 threshold.
Make the threshold .000. Stop trying to overthink it, guess what humans reaction time is, mess around with questions re equipment. .000 allows there to be wiggle room with the variables and takes away the possibility of a DQ because someone has an amazing reaction time. If someone goes before the gun, there will be no debate about the sensors because having a reaction time close to zero was most likely a gun-guess anyway. If athletes want to try to rest their hopes, dreams, and years of work on a guess, then let them. Athletes (sane ones) will not be looking to anticipate the gun for risk of DQ.
We need to eliminate non-sensical, over-thinking rules that make the sport harder to stomach, all while not adding any benefit. I mentioned in another post about the Long Jump using a new system that creates a vertical plane scratch. Now the jumper must be behind the line AND make sure the tip of their toe doe not cross the plane (even if it doesn't touch the foul mark) as the athlete rolls through the jump. It is a rule that was created for no purpose other than to overthink things.