Because I work a lot on fonts, cutting and pasting a lot between Inkscape and FontForge I see many features already present in FF which could be very nice in Inkscape. For example the ability to select handles separately from the node.

But here are very sweet new Robofont features which could benefit not only to type drawers :

On the other hand FF visualisation of potential extremas and inflexion point on a curve are extremely useful too.

ivan