It would be wonderful to have "smart bake"-type options (a la Maya) in converting expressions to keyframes, where instead of creating a keyframe for every frame, it only bakes the expressions to existing keyframes (i.e. a "wiggled" property would only bake in the wiggled values on frames where keyframes currently exist). Further options would be welcome, as well, such as the ability to create new/baked keyframes every x frames (for example, if the expression to be baked is posterize time, set at 6 fps, you could convert the expression to keyframes, but only create a new keyframe every 6 frames in a 24 fps comp--and these keyframes could easily be converted to hold keyframes).