I planned this at the same time I planned the previous comic, so the reality is that this isn't based on anyone clamoring for a goose form.
I mean, maybe that happened somewhere with some people? I mostly saw discussions about how geese and rabbits work after the previous comic.
New Game Plus
New game plus modes are when games let your replay them from the beginning, but with levels and/or gear and such from a previous playthrough. Unless they come with difficulty adjustments (I assume some do), they're going to be easier than the first time by a large margin anyway, hence Tedd saying "maybe new game plus".