Indeed! According to WoWHead, You DO have to RAID to unlock the new Allied Races in 8.1.5. The War Campaign requires Alliance to kill Rastakhan to unlock Kul’Tirans and Horde to kill Jaina to unlock Zandalari. You can not unlock the races until 8.1.5 and we don’t know when that will drop. And, you should be able to complete the war campaign on LFR difficulty. Of course, that will timegate the release but it doesn’t matter until 8.1.5 drops. I imagine, because of that, 8.1.5 will not drop until after wing 3 of the LFR opens in 5 weeks - so that Kul’Tirans and Zandalari can be opened at the same time instead of Alliance able to unlock Kul’Tirans before Horde can unlock Zandalari.