Talk:Arbitrations/@comment-2601:14C:4280:52F:98C:EEB0:EAF8:F1C-20181015161259/@comment-198.53.222.181-20181016093625

This is unintentional. The bonuses are supposed to apply to the Primed varients of Warframes and Weapons as well (even DE Rebecca mentioned this at one point), otherwise it would completely defeat the purpose of this game mode's design.

Some frames are confirmed not to work at the moment, Excal Umbra being one of them.