When Nayaab and Geetika Di said that Harsh and Gaurav left because they didn't have much role in the script, didn't they(Harsh & Gaurav) know that digvijay track was coming up? I mean now there's a lot to do for his friends and well his two good friends are missing and the Sagars didn't even bother to make excuses about Arjun and Pundir.
Also, how in world did they assume that they didn't have much to do in the serial? As per the digvijay track, loads of wars and politics scenes will be there where Prithvi and his friends will make plans and fight. Right?
So I am assuming that they left due to some other reason and not because they weren't too happy with their track.