The logic that the better a player is the tighter the equipment is terrible for spectating. Can you imagine if the NBA played on 12 ft rims because, "too many players can dunk now." Or the NFL raising the crossbar because the kickers are too good? Or EPL shrinking the goals because too many guys can bend it like Beckham?
Pro sports is about entertainment, not making sure the most dedicated autist wins every event. A looser game, especially for nineball, ya know the fast gambling game, is much better for spectators. How many times does that Melling run out get passed around compared to a Filler break and run where he never gets out of line.
If the game is indeed too easy with 4.5 pockets, great, shorten the shot clock and lengthen the races. More opportunities for something exciting to happen.