^^ Actually, after today's episode I think it IS Prem. Although he was harsh with Harman, I think he has a good reason behind it.
About Gayatri not becoming alright, I am SOOOO happy that they don't show her becoming alright in a second. That is very unrealistic, and I'm glad they show her slowly recovering. After such a big mental shock, it's not possible to become normal in just a moment. Also, gayatri becomes better and actually smiles with Prem around, she is recovering. She can also feel Prem, like the first time she saw him. It was so obvious that she could feel it was Prem, but, even then she wasn't perfectly normal.
Actually, about the chand, I just realised Heer has only started talking to the moon after Prem died, and that's exactly what she was doing in Rajasthan, when she first met Prem. She was practically screaming for Prem to the moon, so I'm sure he must have made the connection. The moon is just a symbol of Prem-Heer's love, so it's obvious that Heer would think of Prem.
About Prem not being bold enough, you would think that Heer would also not be that bold, but both of them did say 'I love you' to each other. So, what does that say about Heer? I thought they were just awkward with each other at that moment, and Prem felt guilty about leaving her.
One more reason I think it HAS to be Prem (other than the fact that Prem's pindaan wasn't completed, Jugni keeps on talking about PREM-Heer's love story, and the whole bg music saying RAM had come back to the house) is that his scene with Gayatri.
He clearly tells her that "aap hi to meri bhagvan hai na, maa", which Prem said to Gayatri when they were alone. So, even if he does not fully have his memory, he clearly remembers something of his life as Prem. I don't think even RR could have told Prem about this dialogue, unless he was having Prem and Gayatri followed 24/7, lol.
One thing is for certain, if they bring in this angle of Prem not being Prem, then the TRPs will drop. I certainly will not watch this show, because I see it for PREM-Heer's love story.