Third point ia something i don't understand. Why viaan is still shown hopefull. The way she shouted at him made it very clear that she ended things between them and she didn't even come to meet him when he was going to jail. Her leaving job, not keeping in contact etc all are proof that she is not interested now. Why viaan would still hope that she is waiting for him.
By now he must have turned into his old angsty, rude viaan. If not, then atleast he would have left hope from his "jugnu"
Since police came to arrest Viaan at Raghuvanshi house, she did come to meet him all the way from Katha house in goregaon to Raghuvanshi house in Bandra but, she didn't face him. Why she didn't face him can have various explanations. Ask Viaan stans, they will say she is selfish. Ask some neutral person, they will say how can she face Teji, Ehsan and Viaan when her family is the reason he is going to jail and she has already asked Viaan to leave. She is running away from herself.
About Viaan, he is tenacious. He went great lengths to understand why Katha asked for a crore and what did she do with it. He also went great length to woe Katha. She is his first love and some of the best moments of his life has been spent with her so, I don't think he will give up that easily. He just wants to talk to her and know what she thinks of him. Let's see what reaction he has when he realizes that Katha has moved on with Raghav.

They fell in love and had no embarrassing moments. I expected physical proximity problem for at least 30 episode. Phewww 1 bhi nahi mila...they got comfortable in blink of eyes