Yeah, this should be implemented. I'd even go as far as to say there should be an automatic message on the rpg for people to see when they log in, such as when you win a prize in a challenge like the training challenge, letting people know of the new Discord when they log in.
This will not only let the existing playerbase know of a more active chat system, but might also encourage others to join that are yet to become a part of the forums/chat community.
For now, if there is anyone reading this that isn't in discord already, this link should work:
https://discord.gg/DU9FazX