With a decent production value and efficient work from cinematographer Balasubramaniem, Kathakali has no complaints with regard to the overall quality in presentation. The editing could have been much precise with respect to the number insertion shots or shots giving more details (avoidable as it seems unnecessary) used. Hiphop Tamizha must start using other voices in his track as the repetitive feel of his style troubles the experience.
Kathakali can definitely be considered for a one time watch but it might fail to give you that 100% satisfaction that you may seek.