I'm only a small buisness user and I'm not sure if this has been suggested yet, but here goes:
Having the option of using account codes to quickly allocate transactions in banking, particularly when using linked Bank accounts.
I have an account that I use regularly for certain purchases that I make on the Business account that is not in the inital expense account list. What it means is that there is a bit of clicking & scrolling to get to that account to choose it for allocation. Currently I have got a little behind on allocations so now I'm looking at doing the same process 130 times instead of just entering 5 numbers each time ie. 1-5000 or something.
Basically, where the "Allocate me" option is in the Banking tab, have the ability to enter account codes as well as the drop down options.
If you use certain accounts regularly, this feature would mean you can just puch in the account code and therefore speed up any data entry etc.