A few thoughts regarding Lustful, Indulgent, Temperate, Chaste and Energetic...
1: Indulgent is supposed to cover a desire for all pleasures in life, including sexual appetite, yet we have the Lustful trait as well. I don't think we really need two traits for carnal activists, so these two could be merged without the game really losing anything (the combined trait would preferably be Indulgent, but with the symbol of Lustful). Similarly, Chaste could be seen as a specific variant of Temperate.
2: I think it would also make sense if the Lazy/Energetic trait pair was merged with the Indulgent/Temperate trait pair, since Indulgent is really the opposite lifestyle to someone who is dedicated to his work (Energetic). With such a merger, it would be reasonable and possible to give Indulgent +1 health and +1 fertility while also giving all the associated work penalties, while the opposite would be true for Energetic (all work and no play makes the king a dull boy). Perhaps Indulgent could also give +1 prestige (for all the parties and adventures) but -1 piety (you don't get lots of brownie points with the church for that kind of behaviour, really) while Energetic would give the opposite effect. That would sort of put Temperate in the middle. Dunno if it would be possible to have a trait triplet (with Temperate as the non-modifying "middle road"), which would look the best in characters, so I suppose Temperate could just go away.
(and perhaps, if some diseases are removed, we could introduce a new Impotence disease?)
(and perhaps an "Adulterer" mark as well, somewhat similar to Kinslayer but with different effects?)