Yes, call shot makes 14.1 slower and harder to watch. I would prefer that you only called combos and caroms --- otherwise you only keep shooting if you pocket the first object ball struck. Slop would be rare indeed. I believe that call shot contributed to the end of the straight pool era and the ultimate emergence of Texas Express as the pro game. Spectators want to watch a game that keeps moving. Call shot is a step in the opposite direction.
C'mon, Stu, do you really believe that? Call shot as it is commonly understood today merely means you only have to call shots that are not immediately obvious. Having to call caroms and combos only wouldn't speed 14.1 in the least, and it would make things even more confusing for spectators.
Is there a single shot that this man shoots in this clip where there is in the least bit of doubt as to his intended pocket?
https://www.youtube.com/watch?v=k79m0-4q_Rs
He never spoke, never pointed to a pocket with his cue, just got in his stance and made the obvious shot in each instance. How would calling his ball and pocket have forced him to slow down?
What slows straight pool down is 100+ point games and protracted safety battles, replete with intentional fouls and such. Once an actual run has begun, most great players get into a much faster ball pocketing rhythm than you'll ever see in rotation games... Texas Express 9-ball included.
When players like Schmidt, Feijen, Appleton, or Hohmann get rolling on a long run, well, that is about as exciting as it gets in pool to me. But they make it look too easy to the uninitiated, and that, more than speed of play, is why the casual viewer finds it boring to watch.