In http://typedrawers.com/discussion/1111/fontforge-harmonizer Michael Vokits said,
As for FF, the only feature I think it actually lacks is the ability to always show node positions, and that's purely a preference thing (it's a real drag having to go to the View menu over and over).
Similar to 'Show All Control Points', this means:
When active, it would look like this FontLab screenshot:

or this RoboFont screenshot (thanks to Nina Stössinger for posting it in the TD thread above :)

However both show failure where points are close together. So a bonus task would be