As someone who plays a lot of support heros (CM/Rhasta/etc.), I often don't get the kills or intentionally let the carry get the extra cash as it helps the team more. As a result, I often end games 3-6-25ish. This gives me a K/D of 0.5, which looks bad.
I suggest that instead of K/D, the equation be changed to [(Kills + (Assists/2)) / Deaths]
This will allow support players who don't always end games with great records to still have a decent stat (that people like to discriminate against). This also helps to curb kill steals / stat whores.