I disagree, and think it should have been 3 points.

Backgammon (3 points) - the opponent hasn't borne off any pieces and still has some pieces either on the bar or in the winner's home area (the six pipes where the winner bears off own pieces).

Since at that point, you COULD still have been sent back to the bar and/or your home area, then the max possible should be counted with a timeout in my opinion - so 3 points is what I would think a timeout should be worth.