Repeatedly stated reasons:
Difficult to manage for users if the vault tool is mandatory.
Difficult to manage for WM's if the vault tool isn't used.
Personally, I think being WM is hard enough as it is. We need to use the vault tool to make sure vault numbers are correct for both fairness and justice (penalties).
Wut... I have no clue what you guys have been smoking, but using a vault tool (like last wars) was MUCH easier than keeping track of everything yourselves. Its essentially the exact same thing, but with an easy ass format for you. And before anybody says anything, it takes zero gdocs knowledge. You just literally have to know how to type numbers in boxes, which should be common sense. I honestly don't see how managing a vault independently can be ANY easier than typing numbers into a ready made, colorful spreadsheet.
I guess you could be talking about deck codes, but again, the tool last war was extremely intuitive, and IT ACTUALLY CHECKS IF YOUR DECKS ARE ILLEGAL.