If I may expand on this slightly, this is what I said in a seperate thread only recently:
I have been wanting, and actively asking for something in between Large Chest and Vault size since my first suggestions list. I say either an XL Chest or a smaller vault resembling an upright safe. Maybe say around the size of a foundation piece or thereabouts.
That is another one I would like to see added. The disparity between a Large Chest and a Vault is massive; so is the size difference! It is like jumping from a size L to a 5XL. I wish we could have something which meets the two half way, such as that above. Here is the other thread:
https://forums.funcom.com/t/improved-chests/76571