At some point (likely not soon 
) I intend on modifying the parts factory to do this when generating generic ICs and headers (and fix double row headers which are currently broken in breadboard.) I had started this a couple of years ago, and recently went back to it when I discovered there is code to deal with older Fritzing versions which makes this whole process much more complex. I think the way forward here is python as @microMerlin has done to prototype what we want to do more easily than changing the C++ source, and once we have a desirable set of tools modify the parts factory C++ code to implement it. I have a few parts, one example here:
with oblong pins for headers. I think there should be single row version as well although I couldn’t immediately find them. At present to get different sizes you need to edit the underlying svgs though there isn’t yet an automated tool in python.
Peter
Peter