Why... Bungie has already doubled the vault space and then added a extra 100 spaces. If Bungie did increase the vault space how long would it be until you have filled it up again and come back asking for more. No... the answer is for you to start learning some item management skills.

I constantly horde so I’m at max. I get something cool and it forces me to delete a few things. I hate vault cleaning.

You’re hoarding too much crap, This makes me laugh