I watched all of the Accu-stats Make it Happen 1 Pocket where they had a shot clock every match and on every player. The game play was exciting. The shot selection seemed non-compromised by the clock (to me anyway). All the matches were spot on time for when they started.
I don't see any disadvantages to a clock. THese are pros we are talking about, not weak players like me
They have seen every shot countless times before. Their shot selection process should be much quicker than amateurs. In addition, their shot execution process should not degrade if they were forced to execute under a shot clock.
The clock should be implemented for all matches and all players, as part of the tournament rule set. I think its only the lack of a reasonable and low cost method of doing this that is keeping it from happening. Someone could write a custom iPad app that is at the chairs of each pair of players. It could be programmed to beep when a player is at 10 seconds, etc. It could be modified if its logic is improved over time. It is a low cost solution (no physical person needed per match to start/stop a time clock). Hell, it could even be linked to an overhead scoring system that hangs on the lights that would include a time clock, game count, ball count, etc.
I really like the below implementation of a shot clock: