I don't think it would be realistic to expect Kasam to get into its previous glory immediately after KS entry. It should even be seen if it can be attained b'coz Ekta is losing gripping on her existing shows even KKB with launching so many shows all together. With Chandra nadini, PDMHMD, Naagin 2 to be launched & her concentrating on BR, I don't think she is ready to give enough attention to her alreading running shows. Moreover the channel too is getting hits like Shakthi, Udaan & Naagin and many promising launch like Devanshi, it should be seen how much effort they will take to revive kasam.
Ekta did a blunder by changing the lead every now and then & breaking the flow of show. Now she should make some extra efforts to get the show back on track, if not I don't think Kasam can go to 2.8+ TRP. A clear verdict will come only after 1 month.