The first step was very easy so people got multiple if not all weapons which imply they can't/won't block players with a time-gated grind, not until 6.55 at least. Imagine if you had run like 100 expert roulettes for each weapon. And not like they are adding trust support to MSQ instances without a reason. They are aiming at solo/old players that don't have time or interest in MMO design from 10-20 years ago (when they were kids and had the time for it).

At 6.5/6.55 they probably add a step requiring X alliance raid clears and people will be furious they have to do 5, 10, 20... runs per weapon and if they don't add it other people will be furious they didn't add it. And healers will be furious if they add piety on the third step while tome/6.4 weapons will not have it becoming BiS for long because 0.1% parse... or they will take down crit from tank/dps weapons