When one Ironstar, and only one, rolls over 8 people and they don't die that means it ha been nerfed to remove any expectation from the group. What they should have done is have only one engineer spawn, rotating which side it spawns on, and have the star kill people. Then there is no personal requirement for anybody, like whoever is assigned to do engineer, an am actual group requirement of moving.
Naz's stance was poorly implemented on any difficulty IMO, but it is still a mechanic that applies to everybody. Same with the shockwave which also shouldn't have been nerfed so low.
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Actually
More heirlooms for alts. Plus getting the mount as a reward without suffering through hundreds of pulls each time. If the heroic mount was tied to the FoS and you earn all heirlooms instantly then you may have a point.