So the whole point of your gripe is that you want to have an automatic bomb selection, the same way that you can have automatic fuel tank selection, because you don't want to have to remember to switch between hardpoints/bay loads? The last time I looked, that kind of selectivity only existed on the big bombers like the B-17, where you could pick which bomb racks would be triggered when you hit the pickle switch -- and even then, you'd have to reset the intervalometer so that you could trigger the rest of the bombs. A comment about mixed bomb loads from John R. Johnson, a navigator from the 100th BG, describing his 7th mission in December of 1943:
I wasn't overly fond of these mixed bomb loads as some brain had figured out that, due to ballistic differences, the high explosive bombs and incendiary bombs would not fall in the same place if released at the same time. So, it was decided that the bombardier would set the intervalometer to release only the high explosive bombs. Then, as the last G.P. bomb was away, the navigator would start his stopwatch while the bombardier reset the intervalometer. After so many seconds had elapsed the navigator would hit the toggle switch to release the incendiaries. Never did find out if it worked or not.
It doesn't look like the bomb selection equipment of the period was particularly intelligent; I don't see that the problem requires fixing. Having an indicator in your bombsight view showing what your currently selected munition, salvo size, and delay are would be useful, though.
