Great, perhaps you might detail the ESSENTIAL benefits NOT OTHERWISE available through innocuous means and/or basic management by game officials, currently readily available or through minor adjustment, by long existing practices.
The primary benefit - and the purpose of the rule - is dramatically improved consistency in making the ball ready for play. Prior to the 40-second clock, it was up to the referee to determine the pace at which the ball would
declared ready for play, after being
made ready for play. Referees were directed by the NCAA - albeit informally - to declare the ball ready within 3 seconds of the ball being spotted. Many referees strived to follow that directive, but some consciously chose to ignore that directive, and would declare it ready whenever they thought it best to suit their self-interest (particularly to avoid the dreaded DOG), often allowing Team A to consume a lot of playing time by dragging their feet in getting subs into the game, etc.
The NCAA recognized this inconsistency, and took action to take this element out of the hands of the R, and provide the necessary consistency by rule.
This is the Texas site, and, particularly in Texas, in UIL contests, a lot of Rs would consciously be slow in declaring the ball ready, so as not to annoy the coaches (even though those coaches would take excessive amounts of time to send in plays), to avoid getting scratched. I know some Rs that would wait until Team A broke their huddle to declare the ball ready. (Why even have a play clock?)
Today, even with the 40-second clock
rule, I see some similar actions by Rs. They'll arbitrarily pump the clock to 25 solely to avoid a DOG, even when Team A has dragged their feet in getting a play called. Especially after a kickoff. If the play clock is under 25 when we finally get the ball spotted, yeah, I'll will - and have - pumped it up. But, if we are able to meet our goal of getting the ball spotted by 32 on the play clock, then Team A simply has to choose a play, and move quickly enough to get the ball snapped before the play clock expires. In these instances, we are constantly reminding the team that the play clock is running. By and large, they get the ball snapped. Sometimes, they have to take a T/O. Once in a while they get a DOG. That's they way it works.
Personally, I prefer the 40/25 setup as we have it. We just need 1) visible play clocks, and 2) operators that are trained and competent. So, I don't want to go back to any 'old way.' We could NEVER achieve the same level of consistency via minor adjustments in previous play clock environments. Maybe in the NCAA, but never in Texas.