Suggest the transmission fluid be changed, including draining the torque
converter and replacing the filter. You don't know when it was last
done, should be done every 30K miles.
That may relieve the shift delay into Reverse.
1 to 2 shifts when the box is cold are, well, shall we say .... FIRM.
Once YOU know that, you'll let up on the throttle in anticipation.
It's when ALL the shifts are harsh that there's something to fix.