In a recent post by Greg "Ghostcrawler" Street, he said the following about Loot:
I bolded and underlined for emphasis.it’s important for random dropped loot in WoW, or any game that has it, to feel exciting. When the loot starts to be too predictable, it can feel good in the short term to have more control over its acquisition, but in the long run the game can just feel more like a treadmill and the exciting moments of opening the mystery gift box just don’t land any longer.
I agree with Greg here, RNG in the loot game needs to be in the game. If everything were predictable, gearing up doesn't feel exciting anymore.
Think about how you currently gear up an alt. Grinding nethershards is an absolute predictable way to gear up. You grind 400 shards, you can buy an 850 piece. You grind 5k shards, you can get an 880 piece. Boring.
If dungeons only dropped honor / valor tokens, and you used them to just buy gear you wanted from vendors... Boring.
RNG has its place in MMOs, and it should absolutely stay. Anyone who thinks otherwise, please present a logical argument for why it shouldn't be a part of an MMO, especially one like WoW.