Agree 1000%. This is the approach I took with my DD as she began TB at 10U (now first year 14U). I never complained about playing time and actively shut down any such complaints by her. I just said, if we do the work, then he will have no choice but to play you. This is largely what happened as she slowly climbed up the depth chart as a pitcher and hitter. She didn't do it with raw athleticism or "daddy ball"--she turned herself into a ball player with hard work and a pretty high softball IQ for her age. (13.5 now). If you do the work and are better and the manager still does not acknowledge that with playing time, then you need a new team.I'm inclined to go to the same place I go to with parents of younger players who complain about playing time for their kid who is "just as good" as another player who got (perceived) preferential treatment...
Be better. Be undeniably better. Be so good they cant ignore you. If you're not now, get to work until you are.