I actually completely agree with you for the most part. Although I think the whole miscarriage track is way too overused in Indian television, I think that it's necessary to happen. You know, Aarti has to be the freaking Jhansi ki Rani most of the time on the show, and I just don't think it's fair to her. She has to battle everyone who thinks ill of her, who wants ill of her. She has to try to forge a place for herself in this home where she was not wanted at first and, now that she is loved by most everyone, still doesn't have the love she craves for. It just pisses me off how Yash completely refuses to acknowledge her presence. I mean, come on, dude! She's gorgeous, she's intelligent, she can hold her own against any member of the family and of society...dear lord. I'm a girl and I'm in love with her. He just needs to get his head out of his ass, honestly, and realize that he needs Aarti just as much as the rest of his family does. But, getting back to the point... I think that Aarti needs to have a miscarriage because of two reasons. One, it's waaayyy too early in their relationship for them to add another kid into the mix. And, two... I feel like Aarti is so in love with her baby that it would truly break her to lose it. And, we never get to see the broken Aarti. We never get to see Yash take care of her. I mean, I'm not evil or anything... I don't want her to be depressed because I think it's funny or anything. I just want her to be broken because I want Yash to support her and take care of her. I want her fragility to bring them closer together. And, I think it would be absolutely fabulous if she blamed Yash for the miscarriage and refused to trust him or something. Because, I think that her refusing of his affection and care would truly show him the meaning of Aarti in his life. I think it takes losing something you have to really care about and figure out what it was worth. And, Yash needs to "lose" Aarti, in a sense... in order to gain her, or win her back again. And, I think that Aarti's miscarriage followed by subsequent depression and mistrust of Yash would ensure his affection/ love.
But, hey...those are just my thoughts haha.