Deja vu...*sigh* I really hope things work out so that Karan doesn't leave permanently! He is the one who gave Shaan a fascinating sort of charm, in spite of all his personality quirks and shortcomings!
If this is for a film shooting schedule, couldn't there be some sort of way to shift the focus from Shaan-Rajni to other characters, like Dev and Shogata, whom Rajni can also interact with? We still haven't seen the detailed repercussions of Dev-Shogata's marriage arrangements yet...and they are a very important part of this show, too!