First the loot should be able to be categorised into separate tabs so we can have tabs for each boss. Then there should be what you can see based on rank for example, recruits cant see the bank, clansman can see whats in the bank. Guardians/gens can see whats in the bank and have customisable roles by the chief for what tier and type of drop they can distribute, there should be a log going back x amount of days so you can see all withdrawals and deposits and who received, withdrew, and deposited.
Certain ranks should have customisable allowances on the amount they can withdraw and hand out. There should be options for gold to be able to be stored in the clan bank for those clans that like collecting boss gold, also elixers/alts/rebirths and other items can be stored in an 'other' tab. If you're going to do the clan banking system don't do it half-assed, make it right.
UltimateIronman - Level 50 Morrigan
Youtube Series here