I was always a fan of being open about what you talk about, no secrets. In terms of football its important you do that, as your ideas might benefit any players under your regime. Ultimately its the players responsibility to listen of course, you are Simply pointing them in the right direction.
The application discord offers the opportunity for conversation, an idea would be to simply use this concept for an open debate? The channel is always open so feel free to actively use it. Follow this link.