As I said before, it is a tough task to shoot people, faces, gods and events at crowded festivals of India. There is no luxury called "time to think" and frame and compose your captures. You shoot things as they happen in the worst of light and tight crowded settings and in absolutely no control of any thing except your shutter release.
Most of my work is like that and oft times I wonder if the same people could be photographed in an arranged setting then the clarity, the setting and the composition would be under control and would go the way you wanted it to be.
That thought apart, the challenge of shooting something so complex and difficult is what makes photography interesting.
2 cents later;-)
Prof M P Chandrasekharan reckons that the middle dancer, the one in focus is Ottan Thullal. It has nothing to do with Onam, and the dance is about 300 years old, created and choreographed by the poet Kunchan Nambiar. See reference here
You can see an intruding arm of a person in the frame to your rhs which I have not removed from the frame as that some how was making the photograph lose its fine balance and it is so illustrative of the fact that it is impossible to get a clean frame.
DSC_0790 via ACR sel cu le sh 250pxl 41 pc nik sh with bg darker face cyan lighter copy sash color reduced etc