It is [i]just[/i] big enough. I can't keep duplicates, and I have to run each character with an almost full inventory, but I can manage it ok. I have to be strict about new drops and I can't keep any blues, but I have all but 1 exotic and only the weapons & general sections are bulging. Honestly I could dismantle 50% of my weapons without really suffering however I am trying to get full faction collections to show my "loyalty" on certain characters. This is more about me wanting to roleplay a little than the vault being too small though. I just have to be prepared to shard a fully upgraded weapon because I got a better duplicate drop... This is why I never have many ascendant energy built up in reserve and most of my legendaries are capped out at 294 damage...