A preseason by itself will do as much to teach people as having no chat will. Sure, players can ask their friends or people they know that PvP more regularly about how it all works, but nothing beats practical training. Of course, diving in, having no idea what's going on, and just losing constantly doesn't help either. So really, the proper fix is to either start offering in-game help/training for teaching Feast basics, or restore the ability to chat and allow players REAL communication.