I also think it didn't live upto expectation. May be MT & Hariharan are to blame more than Mammootty. Pazhassiye glorify cheyyunna scenes orukki Mammootty kk vilayadanulla scope MT yude script il undayirunnilla. May be MT had limitation being a biopic. MT had said that himself before. He didn't have the freedom he had when he wrote OVVG.
There was one scene where they could have taken it to another level. Mammootty facing his army and givin a motivational speech. That scene was a big let down for me. MT could have written a bit more powerful dialogues and Hariharan & Mammootty could have made it to more intense. Compare it to the scene in Troy where Brad Pitt gives a similar motivational speech. In Troy, you get goosebumps, here not really.