I thought she was great today. Her character is supposed to be mischievous and talkative, may be that's why a lot of people here thought she was overacting.
For a new member of Balaji cast, she's got the looks and her dialogue delivery is perfect (specially for a person who has never faced a camera before as many articles have iterated).
All I have to say is - Good choice Ekta! You have done it again.
Please don't compare her to Smriti. There will never be an actress like her, but Moni fits the new tulsi role well.