+1 for withdrawing 15 (Maybe even displaying the last amount from "withdraw X" as an option) -1 for removing timer. It's easy enough to time your clicks out, plus faster mindless clicking could lead to people making mistakes.
-1 to the withdraw 15 from bank while you are fletching just leave the bows in and withdraw 50 bowstrings/unfinished bows and then bank bows and withdraw the second thing +1 to the high alch timer removal