Neethi, your questions are massive and I am rather disoriented to catch them and chronically answer. So, how about the way it goes? 
The entire first half of your potential debate reminds me of a chapter from Eclipse, the book wherein Jacob accuses Edward of having lied to Bella. Edwards says that he was 'just trying to protect' her and Jacob retorts, 'by lying to her'. So, that's that. Jay's solace to Pia, regardless of his intentions, whatsoever and he is the only decently but truthful being of her life. Like when he told her in the last episode not to stare at Abhay the way she was or she'd never be over him, the casualness and firmness his voice held really shunned my puke-worthy sentiments for a while and I awed at him. Somehow, Misha and Jay's turmoils are of far wider expanses than Abhay and Pia's, I feel. They are acquired and shaped with respect to the story, and their unreported magnitude pulls at me. Misha's going to have to be really cautious, because she basically knows that Abhay's a good man. Somehow, it is just tricky on her part, someway in the end, she could be left hurt, trying to protect her sister. And whilst Jay's got 'intentions', I solemnly feel he's worth a few tears of empathetic sympathy from my side of the world. He's going to be really awful. 
And Pia Protection Program was none of my businesses before her memory loss, however now I feel too that's she is a puppet, a dumb and basically still the same puppet, on that. If she listens to Tee and well, gets landed into a tiff with Misha, it would be enthralling to see. Though, I would be disheartened or something if her trust for Abhay gains momentum when it comes to Jay's identity. This is too early to be unfair on Jay.
And period
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Savage