They might as well end the show, after Brahma's defeat, there won't be any interesting story lines to follow up. They could have done a lot with Gaurav-Karan's story, unfortunately they lost their creativity here. Having said that, they did a great job in spreading awareness and the story, although short, was portrayed beautifully.
I too feel that the actor was losing interest in this character, if that's true, it's better he quits. But, we got to give Dakssh credit for trying (at least during the initial stages of character development). Dakssh did extremely well in the beginning, but after Gaurav came out to Adi, the character did not develop. In comparison, Karran's character has been very consistent, he has played it with enthusiasm to this last episode, if anything he's improved a lot.