For this, give us a huge bank slot or bag or keyring equivalent and then make something pointlessly complex if you wish.
We're not trying to over complicate the situation, but if we're looking at adding a new feature, we want to make sure it's meaningful and appropriate for the game in the long-term. (Or, you know, at least try to.)
Right now, we're considering a variety of options because we agree that tabard storage would be great, and some of those options extend beyond simply adding another bank slot -- not because they're complex, but because we believe they'll make the most sense and feel the best when you're in game.
Exactly this. And I wish that Blizzard would start recognizing it.
We're not against interim solutions on principle by any means, especially if we feel they're worthwhile. It's just that we have to tread lightly and always be mindful of what happens to those stopgaps once the final product is released.