Don't assume people know how to communicate. Provide education material, cultural backgrounds, descriptions of things to avoid. Incentives that are aligned with good communication.
For example:
- Chat discourages thought. - Chat burries decisions. - Brainstorming and ideation vs reasoning. - Brainstorming, ideation and reasoning vs preferences and biases (CEO weighs in) - Documentation vs works in progress. - Proposals vs time to consider them. - Bike shedding. - stupid forum formatting. etc etc etc
Current social media is shockingly poor training for good communication.