It would be nice to have a button to express "Sorry you're suffering; hugs, sympathy." Favoriting a sad status seems a little sadistic. An emoji looks oblivious, and written messages might appear like you're The Vampire Angel of Sympathy, stalking the miserable. It seems so cold just to let a "feeling lousy today" status stand alone.
@Berthavlix make it a hug button and then wait for all the rightists to complain that masto is a hugbox. "I know, that's what we like"