Well, 1.6 is probably not enough for Star as this is a prime time slot and it's a spinoff of their longest running show YRKKH, so there will be high expectations. They probably expect it to be a top 5 show and anything less is below par.
TRP junta likes extreme drama and suffering bahus who fight against every evil that exists. Most shows that are TRP toppers have superwoman leads who have the solution to everything- from khatta kheer to business deals.
YRKKH has a superwoman lead and I won't be surprised if YRHPK turns Mishti into that soon. They are already showing those signs with the Ketki-Ved storyline.
Right now, the story is a tad bit boring 'cause the pace is slow. They need to focus more on developing the dynamics between MishBir and KuKu. Of course, that's what I want lol.TRP junta is not at all interested in love stories.