I know they need to carry on the story and there is more interest when characters have troubles but there must be a basic characterisation which must be honoured through out a serial. Look at what they did to Kripa in Kaisa ye pyar hai - finally no one had any respect for the character.
Unfortunately Ekta never understands the difference between twists in the story and ruining characters just to carry the story forward. If she spoils Jai's character, makes him a weak chap who veers from one woman to the other, I don't think I want to watch KS. Ekta has done this many times in the past.
I feel there should be some integrity in a lead character - true love means something special and a serial's characters should have some strong values. Its only then that we identify with them and love them so much.
If you run out of story, just end the serial and we will carry happy memories of it. But don't ruin characters just to prolong your serial. What do you say?