What the game should take into account is that working out isn´t the only way to shed weight. Can´t be fine tuned for every player´s taste, though, and that´s why I prefer no moodlets for weight change at all. And then there are these sims for whom weight is a sign of wealth - to these weight gain ought to trigger confidence. And if a sim hits the unhealthy state (which doesn´t seem to exist in the game - or at least I have not witnessed negative effects for my sims yet) tense would be much more appropriate than embarassed.
Or you make a normal sim and she becomes overweight, but not to the point of unhealthy - no reason for embarassment either. Let´s say you make an underweight sim and have her gain weight, then she actually becomes healthier and should not feen embarassed, but confident.
To the contrary, they should get rif of the 'confident' one, too. Of course, there should be an 'embarassed' emotion change when gaining weight, after all there's the 'confident' one when getting thinner.
