It was hotfix nerfed long before you were trying it. Not sure why a blue never posted to confirm when the hotfixes went live since they announced they were coming and then just went silent on this topic.
Battle shout should now be the shout you’d use for AoE threat, not demo. Demo shout was bugged to multiply threat based on the number of targets, which was not how it worked in 1.12 so they nerfed/fixed it.
Battle shout was bugged and not giving the amount of threat it was supposed to, so assuming it was also hotfixed (why did no blue ever post to confirm these hotfixes were both live?!) then battle shout now generates the amount of threat it’s supposed to generate x the number of friendly targets you buff with it.
edit: this was the blue post about the bugs but they never followed up: Demoralizing shout is bugged and it is why we have this AoE meta - #64 by Aggrend-1483