This may sound stupid but please allow me to share my view. Sorry for the bad language. I could wish that there will be a Guild Bank that can store the money being deposited by the members in guild. Those money can meant to buy decorations for the guild hall. Tier3 Guild hall may seem big but it may be kinda dull and boring inside the hall (No Offence). Hence, i hope there will be a guild bank to store any amount of money to buy some decorations for the guild hall. Hope this will help!