I agree with you to the power of infinity what you say about Kesar being sidelined. Though I watched the show only because Neil played Kesar, I have sincerely, like a true fan watched the whole show to get the feel of the story. In spite of my late understanding of the story, I very much enjoyed the Vasant and Gulaal scenes. I am honest when I say it was not out of the already available information that Vasant is no more because there was still a possibility that Vasant may return.
Kesar has matured over this period. He has had a troubled childhood too. Anyone in his position would have been insane by now and it surprises me that he is still capable of showering his love towards Guaal, his parents and be civil with Dushyant too.
And I feel sorry for Kesar that everyone seeks Vasant in him. I respect Kesar for what he is. In spite of all the shortcomings in the form of anger or any other thing, Kesar is ideal in spite of not being ideal. He is loyal to Gulaal whom he thinks as his wife and love of his life. He can be cold with her and hurt her too but is a thorough gentleman in not laying a finger on her with a bad intention, who can sleep on the hard floor of the balcony just so that Gulaal is not in discomfort. He is not shy in repeating that he loves her but has the utmost patience with her even when he has been slapped by her many times . He respects and understands Vasant's position in Gulaal's life and asks her to let out her emotions as tears instead of withholding them. He has been the ideal partner to Gulaal in his own way by caring for her happiness in little ways; and he adds meaning to Gulaal's life..
He is the ideal friend when it comes to Talli that he is not making her trapped in a loveless married life with him though he is capable of leaving her stranded midway.
He is the ideal brother who cares enough to apologize to Yogesh's boss when it came to Reva's suffering.
He was the ideal individual when he went on to bear the medical expenses of the guy he had injured because he was genuinely sorry.
He is straight forward in demanding the truth about his brother's death or in demanding the truth about Dushyant and Gulaal's relationship that too from his mom. He comes home drunk but respects his dad to the extent that he does not want him to feel hurt over the issue and can also go to the extent of bringing an old time friend like LaljiBa just for a brief period of happiness in his dad's life. He can throws tantrums, and he can mess up his room in anger.
He can be the supporting adult with his concerned MIL and drop her home in his bike and he can be child like in demanding his share of gift from someone like Sarufui.
But no one in the house seems to ever care for his feelings. All he has done is give away unconditional love to all and never sulking for once that he is not being given enough love and care.
Will the family or Gulaal ever appreciate him? Since everyone is ending with a note suggesting the end of the show, I too would conclude asking will 20 episodes be enough to make up for the lack of understanding that the whole family has shown when it comes to Kesar.