Users on a server who do not have a server specific nickname set do not have their default name colored by role. Would also be nice to be able to see all the roles users have when you click their name in chat. Currently the only way to see a role is by clicking on the user list and even then it only shows the one role and not all of them.

You can see multiple roles if you click on the "Roles and Info" item in the right click menu on users. As for not seeing role colors on users correctly, this is probably due to the 4000 user sync cap in Ripcord right now. Nickname or not has no effect.