It takes literally the exact same amount of time to draw the new hands, because Illustrator CS6 has a Blob brush that creates an outlined shape from a brush stroke and merges everything you draw with that brush automatically. I just select a round Blob brush, draw the hand, then apply a color. It takes maaaaaybe a fraction of a second more per hand—though I can draw several and then color them together, so less if you average it.

So if you want to complain about how they look, whatever, but the changes to the feet consumed way more time. And all the feet in the comic put together didn't hold a candle to the time it took to draw the one entrance to the dwarven tunnels in perspective. And I don't see anyone complaining about that.

EDIT: Here's a demonstration of the Blob from Adobe: