I do not believe that Lilith (or the South Node) can ever function as constructive, benefic factors, under any circumstances-because I believe that these factors represent CHAOS in the Universe, and CHAOS can never benefit (it is unbalanced, qlippothic force) Now, this attitude of mine regarding Lilith and the SN, is not shared by the vast majority of experts in this field-most believe that under certain circumstances Lilith or the SN can be beneficial. But from experience I must completely disagree with this more liberal outlook. I do believe that the disruptive influences of Lilith or the SN can be MITIGATED, even perhaps neutralized, under certain circumstances, but never can they be turned into benefic influences, unless one can turn CHAOS into ORDER (in which case CHAOS-Lilith and the SN-would cease to be)...
For me, the value (great value) of Lilith and the SN, is to show where the fly in the ointment is, where the Acilles Heel is, where the "one thing that could go wrong" is, where the "karmic debt" is, where the (usually hidden) liability is, because knowing this we can do something about it, we can begin to take control of our own tendencies and "destiny", if we obtain the knowledge and develop the wisdom to do so...
It seems, to me, that an analysis which insists upon 'Order Good. Chaos Bad.' as it an unstated assumption is one which is pretty clearly incomplete and fundamentally under developed. Nazi Germany was pretty orderly. The French Revolution was pretty chaotic.
Chaos is a thing which makes humans uncomfortable, however if one assumes the universe is the will of a benevolent creator implicit to that assumption is that chaos was created with it and is instrumental to its function.
I'm really not sure about the assertion that 'Lilith Represents Chaos', as that seems uh... reductive, to say the least. Lilith represents a repressed feminine aspect, which is a psychological structure with mechanics that interrelate with other parts of the psyche in order to mediate the connection between the internal and external worlds.
Lilith directs people's attention to where their needs are not being met, as a result of social pressure towards conformity. The failure to recognize and deal with this results in antisocial or self-destructive behavior, because one cannot simply ignore their needs not being fulfilled because Daddy doesn't approve. That may appear to be Chaotic, but its functions are as organized and predictable as any other aspect of the psyche.
Your interpretation is essentially undeveloped from the view a medieval necromantic practitioner would take on the subject, who is the sort of person that would tediously recite godnames, insult and command the demon they are summoning to speak truthfully then ask the demon about spells that will result in them being able to look at women's legs. While acknowledging their contributions, I don't feel particularly beholden to their philosophy and I might suggest that the reason demonic entities were so notoriously evasive and deceptive with them is that most medieval sorcers were pretty arrogant, petty and self-serving while assuming the guise of piety and would certainly do more harm than good if granted any meaningful amount of power.
The Gods are not unchanging and Mars is, today, not as Mars was in the time of Christ, because they act from within us and that interaction (slowly and by small measures) influences the collective consciousness and changes them just as our experiences and influences change us.
Lilith would have been 'malefic' in a time when they were burning scores of women for being witches and doing so as a means of asserting "order" over "chaos".
Today, we understand "burning people alive" to be (in any case I can think of) to be "a bad thing, actually" and 'dark feminine impulses' to be a part of our experience that needs as much care and attention as any other.