coming from the world of windows ultrabooks, it's sorta hard to imagine how a touchpad could be "too big". does the palm rejection suck, or is it just that you think the real estate could be used better for something else?
So having to remap ESC to Capslock and often hitting the wrong arrow key is a much too big drawback to a bigger touchpad
Imo, the touchpad on Macbook has always been its greatest strength and they managed to ruin it.