I get that, but I feel like if you've done that badly for the entire round the chance of turning it around is so small that you'd be better off taking the loss. There's also the issue of being overpowered on the point at the beginning of some maps where the defender never gets a chance to have any sort of last stand. That's why I think basing it off morale isn't working at the moment.
I can sympathize with this since there's no way of knowing how much of a reserve you have left.We have seen so many players question how they can lose a round as a defender when they are still holding the point with a full force.