Exactly, WoW is a Min/Max game at the competitive level and general progression level.
If you have choices but some of those choices are better than others and you cant swap, then it is ILLUSION. This is especially true with how terrible blizzard is at balancing.
Say the expansions releases and X convenant is 12% better than the next best option. You choose it. 2 weeks later blizzard nerfs it and the next best option is 6% better than the previous best option. This is the vicious circle blizzard created due to their poor balancing.
The only way to balance this efficiently would be to make offensive and defensive abilities percent based and make aesthetic abilities... well, it doesnt matter because theyre probably irrelevant to gameplay.