i agree she can't be in KAsam Se forever. Bu its not forever .It is bearly 2 yrs durig which she didn't concentrate only on Kasam Se.
I won't watch her any other serial as I am not sure wheather she will leave that after short time or take up multiple projects which will distract & tire her to the point that her acting will suffer. That happened since Feb 2007, just a year after the show began. Its good that she is very driven but then her show suffers because of that.
I know you may get mad but this is my opinion.May be dulhan & Saat phere are still going strong because in addition to good storyline they didn't have distracted actors & body doubles.