The anima weapons will be equal or superior to the Alexander weapons for a period of 3-4 months in the period before stormblood launches and everyone starts levelling up and leaving behind their current gear anyway. Any skilled Savage raider will likely have their weapon months in advance and would likely have cleared everything of relevance with it already. In both cases the weapon is going to be replaced by a lvl 65 one in 4 and a half months.

People often don't understand the point of the relic/anima. Its to give more casual players an option for grinding out a high level weapon, trading difficulty for time. The relic takes a monumental amount of time. The current step can be completed in 6-9 hours depending on your luck and if you are constantly requeuing. However the step prior took a hell of a lot longer. 24000 tomstones of lore. That isn't quick to grind through in any situation. The step before that took 9000 lore or 5 weeks of running Crystal Tower. The step before that is another 12000 tomestones and that is post nerf. It was even worse beforehand.

Anima takes a monumental amount of grinding but it provides goals to casual players who aren't interested in the stress of savage raiding. If it was just Glamour the number of people actually bothering with it would be far less and frankly since Glamour is very subjective its very unpredictable wether people would bother with it. Case in point, I have hated every bow anima model till the latest but a BRD in my FC loves all of them.