Whenever you're going to buy something from the market or armory, there should be an option where you can pay for the equipement straight from your bank instead of having to take money out of your bank and buy things with just the money in your hand. This idea would be helpful because that way people can't steal any of your money if your carrying it in hand and you don't have to pay the bank fee.
Blood Idea
I don't think I like the idea, when others have worked for their blood and give it to someone new and give them a boost, seems like an easy way up the ranks, along with vial option. That's my opinion though. I don't know how others see it.