My sweetie and I practice APA rules, but have recently made two alterations...
1) Always open after the break.
2) Push-out on 9-ball.
In my opinion, the lack of push-out is a CRITICAL FLAW of APA 9-ball. Both the push-out option and open-after-break rule FORCE those who might just be there for the fun and drinks to THINK about the game and start to understand the myriad of options they have apart from a 5% makable shot.
Have faith in this game called pool; don't dumb it down. Push-out may immediately benefit the higher-skilled players, but rules like it will keep the newbies learning and intrigued. The rest? Meh. They weren't cut out for the game anyway.