I love your analysis of the relationship between SS and KN and SS and K. It's true, SS is reaping what he had sown. His behaviour with Shakti had always been a source of irritation to me, despite considering the fact that Shakti himself is a despicable man.
Parents and family really are the major determinants in shaping a person's character. That is why so much focus is given these days on proper child development, not only physically but also mentally/emotionally. Shakti has suffered from physical and mental abuse at the hands of SS, and some degree of negligence from Amma and GD's side. I say negligence because while Amma and GD were busy pampering Krishna, they neglected Shakti and his need for attention, which led to all these problems.
Shakti's reaction is very natural. Everyone has a breaking point at some time, and his time has come. It's likely he will regret how badly he behaved later on, but at the moment, he will continue his antics as he feels free from the shackles and he is finally independent.
Saying that, I do want Shakti to get his dues, but at the same time, I want SS, Amma and GD to realise that it is truly their fault that Shakti turned out bad. But I know the latter will never happen.
This has always been something that bothers me about the show, no matter how much I love it. Sometimes things are not portryaed as I wanted them to be. Like right now, I want SS to also realise his mistakes, but it's shown as if SS is a desperate man who's facing severe cruelty. I do wish this time they show it like I want it.
In any case, I'm loving the track, with or without Krishna in it. This is a great opportunity to show a male-centric track with SS, K and KN, and I do hope the family's women stay put of this one.