Positive stick force
stability requires that as you go faster from your "in trim" speed
you have to push harder on the stick.
The transonic CP shift
undoes all the good design work so you have to have an automatic trim to fool
you into thinking you still have positive stick force stability. Notice that at
the same time the longitudinal static stability is increased by the CP shift,
that is, the aircraft becomes more difficult to manoeuvre in pitch.