Near the beginning, chats and roleplays both had you press enter to send, and this was good for the chatters. Then it was realised that was bad for the roleplayers, so roleplays got shift+enter to send, and there was much rejoicing. And some were confused by the difference, and some wanted their own way of doing things, so finally a configuration option got added so you could choose your own way to send posts: enter, shift+enter, both or neither, and there was more rejoicing.
The configuration, though, is now back to being the same for both chat and roleplays, and neglects the lesson we learned: what works for one isn't necessarily what works for the other. I can have enter send in chat and roleplay, or in neither, but not just chat. This makes it confusing or tricky when I want to be in both a roleplay and a chat at the same time, so I resort to just using a text editor for the roleplay and keep my send-on-enter config.
I would like config to become split: one config for chats, one config for roleplays, so that I can have something like no keyboard shortcut to send on roleplays (letting me just use enter for linebreaks), and enter to send in chats.
Communicating the fact they're different could be done in the dialog itself somehow, or we could make it obvious on the buttons themselves: have the chat config indicate that's what it is, and do the same for roleplays (or use shorthand).