The info is out there that you need to be Revered in order to obtain Unity (based on available PTR information).
Personally, I’m not a fan of it having a reputation requirement when it could just as easily be attached to a campaign point as it’s account-wide once you unlock it.
Whilst doing the campaign on PTR, next to no quests on the campaign gave rep it was just world quests. I presume that rep will be added later to accelerate it? However, having to log in daily for this level of power gain to be competitive is not fun. It punishes people who cannot play daily and makes them less competitive.