One of the problems with wow these days, is with the vast amount of content in it, there is getting to be less and less space for all the items we get to have ingame.
Some players don't find this an issue since they don't collect things, they don't collect armor for transmog or collect soulbound vanity items, so it doesn't become a problem.
For those of us though who do like to spend there spare time in old raids collecting old gear they use to love so they can transmog it, getting vanity items from factions or quests, as well as getting a lot of offspec gear for some classes that can't use the same gear for all 3 specs, it becomes a hassle to try and make space in our bags, banks and void storage.
So, in what way can blizzard make it more accessable for the collectors in wow. I mean when you think of a game like skyrim for example, that has a system of spread out storage across the game, so you can store items in chests and containers across the place, and come back for them later on.
Obviously this might seem impractical in a game like wow.. or could it? Why can't blizzard arrange the banking system to be more spread out, so for example we could buy a bank slot in thunderbluff that doesn't contain any of the items in say orgrimmar, and properly utilize the banking system across azeroth.
What they could also do, is compact more items into systems, instead of having them take up bank space. Tabards has always been one that should be looked at the same as they once did the mounts and mini pets. Imagine if wow still had you only able to keep mounts in your inventory instead of in a drop down tab. So likewise, have a system of say vanity items, or such like the archiology items come in a drop down list instead of bank space.