>But if the transform is an animation this will actually look even worse

I wish they provided an example video of this since I can't visualize it. My natural thinking is subpixel antialiasing should look fine.

>the characters will jiggle as each glyph bounces around between different subpixel snappings and hints on each frame.

This shouldn't be a big issue unless your animation is slow and your subpixels are big.