I played in the most recent season of Pokemon Turf Wars, and I was on the winning team. Throughout the season, I got better sheerly by playing a lot. But I also plateaued. Thankfully my team has some of the best players in that game and they are really good at teaching. When you get to the point where practice no longer helps you improve, it's immensely helpful to have someone there who knows about the more advanced parts of the game and teambuilding. Without someone to teach you the nuances of battling at a high level, it can be difficult for players to figure these things out on their own.
My idea would bolster the community as a whole, the PCL, and weed out those who don't intend to be active participants all in one action. I know I'm a new member, but I'd be glad to help with any administrative tasks in the league and help set it up since as you said other things are a greater priority for staff.