I'm trying to figure out if theres a way to "tighten" tangents. which would basically be a way to make the tangents flatter, but not actually flat. so maybe it could, say, halve the angle (or at least halve the delta between flat and the current angle).
for those who are interested, I've got a script working. I'll be posting it soon. it tightens (ie makes tangents "flatter") tangents on selected keys. It will be an inclusion to my intelligent keys script.