This would simply save some clicks. Currently the tab has to be clicked every time, but a typical transaction has multiple expense lines. If it is something different, like a PP, it wouldn't add any time to change it to PP from EX from the time that it currently takes. But every time it is an EX (most of the time), it would save those 2 clicks.
Simply putting EX at the top of the list of transaction types would also be helpful instead of having to scroll down every time.
Minor detail, but it would be nice if possible!