@TM - Most likely the engagement will no happen because J will leave for Mangalore with Ganga.
Sanchi knows that if she bad mouths Ganga in front of him her marriage plans with him will be over and done with.So she may not put her foot down on this.
SaJa looks like it will go on for some more time till it reaches a point where he starts feeling claustrophobic in that relationship or till the time Sanchi comes to her senses and knows that she and Jagya are not meant for each other.
Personally I would like to see this relationship and Sanchi really changing for good because of Jagya's influence and realising by herself that she and Jagya are not meant for each other and part as friends..
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If Jagya Ganga relationship has to move forward I don't know how that will move forward unless there is a leap and Ganga comes back as a trained nurse.