There's still one week until Gates of Discord is released on Oakwynd, but Berserkers are listed as a creatable class already. The issue with this is they're also available on personas to create, but there's no way to change from that persona once you create it and get disconnected, so creating a Berserker persona cause the character to break completely.
We'll get this fixed, thanks. If you do happen to make a berserker and get your character stuck, please submit a ticket to CS who will get in touch with us (engineering) to fix it by hand. You can also post your character's name here or send me a PM with it.