Insanely flawed features that still aren't improved.

[Ferocious]

snip

Guild Wars 2 (F2P) - It has a separate storage tab for crafting mats where you can store almost infinite amount of crafting mats. Besides that, you get tons of additional storage (don't know exact number, haven't played in a while).
WoW also caught up with the times and introduced a similar system for crafting mats. Wildstar has it too, it has become a norm to support that feature.
Then we have MMO's that give an average of 300 slots per character once you purchase all bags and bank tabs. That's just for one class and they have costume slots too. Here in FFXIV, we're talking 8 classes all crammed into one character which share 750 slots and no separate crafting mats storage. When you consider that, it's the weakest storage I have seen in any MMO.