I would love the same thing. I would like to change the defaults to 0, 1, 3, 7.
The reason for these numbers is to maximize efficiency of test renders. Here's how:
Render 100 frame skip 2 then skip 1
Skip 2 render of 100 frames will render 34 frames.
Skip 1 done after this will render 33 more frames. 17 of the skip 1 frames will already have been rendered by skip 2, but there are additional frames between the skip 1 frames.
TOTAL 67 FRAMES were rendered and playback is between skip 0 and skip 1.
Render 100 frame skip 3 then skip 1
Skip 3 render of 100 frames will render 25 frames.
Skip 1 done after this will render 25 more frames. Half of the skip 1 frames will already have been rendered by skip 3 since the gaps line up.
TOTAL 50 FRAMES were rendered and playback is precisely skip 1.
Using skip 7 for 100 frames will render 12 frames. If skip 3 is used after it then it will line up with these skip 7 frames and render an additional 13 frames and playback will be precisely skip 3.
The reason this works out is because skip 1 renders every 2nd frame, skip 3 renders every 4th frame, skip 7 renders every 8th frame. So all of the gaps are double the previous option. Skip 5 (every 6th frame) is double skip 2 (every 3rd frame), but skip 2 isn't double skip 1 (every 2nd frame).
I think this should be the after effects default set of skip frame options, but just having the ability to change this in my copy of After Effects would be great.