We've gotten a large amount of feedback since player potential was introduced that indicates a need to tweak player improvement. We're implementing and testing some changes now.
The overall effect of the change will be slower development of players. Currently, most players are developing over about a 2 year period. We'd like that to stretch that out so most players peak as juniors and seniors. Of course every player has a different combination of potential, work ethic, and practice plan, so that peak will vary from player to player.
We're not planning any changes at this time to potential itself.
This change will likely be released some time next week and will immediately take effect in all worlds.