This could have been an epic, landmark movie ! In terms of production and costumes the movie might be one, but had the storytelling be tighter, editing a bit more crispier, some insights into main character's origin or struggles or "thoughts" (we only see his final actions and repercussions of those actions.
Now coming to the movie itself - the actions sequences were well shot - but got repeating and quite honestly boring towards the end. I was almost sleeping through some in the Theatre after a while ( yeah there is bunch of similar slow motion action sequences which definitely could have been cut)
The idea of clubbing Nangeli, Kochunni and Velayuda Panikar as a creative liberty would have been fine had they made a significant difference - here these are done in a messy and pretty ridiculous manner. And king asking Panikar to capture Kochunni and Kochunni stealing from a poor priest are really doing injustice and totally wrapping history cruelly and un-necessarily as well ( it doesnt really after the overall narrative other much )