He definitely deserved a 30! What really bothers me is how the judges have consistently told him that, "This is your best performance on Jhalak so far" every single week which would obviously mean he's consistently improving, yet, he's gotten the same score every time.
I think the lavni act was decent but not amazing and I understand why he got a 27 for that. But the joker act was bang on! He was amazing in that! His kick in the air while on the chair that Sneha was sitting on was very good. His toes were so pointed!
The answer is plain and simple. The judges are biased.