Great!
But sorry to be nitpicking, the perspective in a few icons is way off. Granted on at least one of them it was bad to begin with.
I doubled the following's resolution to better display what I mean.
PartDesign_Hole.svg

- FC017_PD_Hole.png (57.85 KiB) Viewed 1493 times
Green oval at far right represents mostly correct shape. basically the ellipse shape's main axis should be horizontal.
See this screenshot I found in my Images folder. This is an isometric view.

- FC_aricbeaver_view_01.png (16.92 KiB) Viewed 1490 times
BTW this icon is still not visible in the PartDesign toolbar, it's for the Hole feature.
There's code by eivindkvedalen for it in a separate branch, I hope it gets merged soon.
PartDesign_LinearPattern.svg

- FC017_PD_LinPattern_01.png (64.14 KiB) Viewed 1493 times
If a sense of perspective was intended, the point where the green projection lines meet should be on the left side rather than the right side.
The same problem can be seen on the Mirrored and PolarPattern icons.
Overall I think they look much better! I like the new InvoluteGear.