That is a question for Blizzard, not me: right now the pinnacle of character power comes from raid gear, and nothing equivalent is available in the world without it. (Not that this is new, since the valor purchased gear was definitely not the BiS gear when it was available.) I think it would be interesting to see alternate paths for power increase, but I suspect the view inside the walls is that raid gearing power is aimed at clearing raids, just like pvp gearing is aimed at pvp, and non-raid, non-pvp gearing is aimed at clearing non-raid, non-pvp content. (eg: a fully BiS dungeon reward set should make it easy, but not trivial, to clear dungeons, etc.)
Ultimately, though, this is a discussion about how the choice to drop valor purchasing in favor of bonus rolls for the current Blizzard character gearing model works, I think. In that framework, "smarter" WoD style bonus rolls don't seem like nearly the end of the world to me that they do to you, which is fine.
Maybe the outcry will shape this, and they will drop in something else, like meaningful progression through crafting without raiding. I honestly doubt it, because that feels more P2W (to me) than the jump-to-90 does, but I don't work for blizzard, so what do I know?
(Specifically: getting gold is a matter of time or money invested, nothing more, hence being able to get gear equivalent to current raid tier for gold (via crafting) ~= paying in time or money to get the progression without the work involved in raiding. I understand this is probably not the common view on the subject.)