Andreas I pay a lot between my accounts, but mostly those are scheduled payments. Nevertheless I do manual payments still.
As it is now, dragging in the account overview is either slow or too fast. So when I time it I can actually make a payment as it works now faster than when I have to drag an account from the bottom to the top. Of course when two accounts are right next to each other than it's faster to drag.
So I'm still a bit on the fence if dragging and dropping would be easier.
Perhaps something else like swiping an account (just like you can swipe an event) and then reveal an option for "pay another of your own accounts" so you only need to enter the amount and choose the other account.