Honestly, at this point blizzards design philosophy with how RPG elements and covenants work clash with how the top .1% raiders feel.
If they can't choose the covenant/soulbinds/whatever they wan't due to the feeling of gimping themself blizzard should just make the current raid tier have a challenge mode(mythic) with pre-determined item lvl, soulbinds and covenants.
Then, the .1% can just hop in and raid