PAR 11 rewards risk-takers, and probably will lead to a better opportunity for spectators to enjoy watching the battle. Squash may become less a game of attrition and more a game of attack and counter-attack.
Finally, for those players who are outclassed in a match, PAR 11 will give them the opportunity to get a few more points on the board. Instead of losing 9-1, 9-0, 9-0, they will lose 11-4, 11-5, 11-4. That looks better, to some, since it doesn't appear to be a total blowout (although it is).PAR 11 rewards incompetence in squash. It lets the less-experienced player score points through lucky shots. So that's probably not a good thing.
Matches will generally be shorter, also, so those who have made the effort to be supremely fit won't benefit as greatly from their discipline and resolve.
Where It Stands
For squash leagues that are currently using international scoring to 9, no immediate change is required; both scoring systems are still sanctioned.The results for tournaments and leagues played with international scoring still count towards player's ratings and rankings.
All play does not need to be PAR 11; international scoring to 9 is still an option for tournaments and leagues. However, since the national championships will use PAR 11, there will be a strong incentive for all players and tournament officials to get used to the new system.
The US Squash computer system for storing match results is ready. The new scoring system may be entered for results into the league and tournament systems.