I didn't like having to make such a large gesture to minimize a card. Also it was annoying that the window would scroll to the bottom of the page.
I experimented and found that I can minimize a window to a card with a quick diagonal swipe from with-in 2 inches of bottom right corner off the right side with-in 2 inches of the corner. Doesn't scroll the page much if any at all. Works for left corner also, for those of you that are wrong handed.