In that webm of Gadget, why does she abruptly stop, then stretch outward, then upward?
I'll tell you why: lack of understanding of timing. She's moving really sitffly despite having tons and tons of drawings. Instead of ease-in and ease-out like a person does when they move. (Try doing the W pose she's doing, see if your arms stop abruptly or if they slow into position) (By the way, W pose, ring a bell?)
The animators combined several poses and inbetweened them, but with really bad timing.
Look at the hands. On her ass - out - front - up - out - freeze. There's no acting there, no timing to make the motion look natural or believable. Just pose-pose-pose-pose-pose with no thought in the number of frames between them.
Then after she un-freezes she does that stupid out-up shift.
Lots of poses. Lots of drawings. Shit animation.