1. Would be good if some budget is set aside for research, proper wardrobe and a good script doctor.
2. The British won't say straight to the face how the Malays are ununited and easily lied to. Dialogues tend to be preachy and repetitive - imposing idealogies instead of allowing room for audience to think and decide on their own.
3. Hiring a team of silat coaches would be good as the silat actions are rather average.
4. Certain actions and reactions are not natural - an attempt to invoke emotions (smiling to Wahid when your tummy and your unborn kid are stabbed is a painful ordeal; same dialogue can be uttered minus the smile).
5. Minor aspects in the story should be spotted during post-production:
A. Sampan tied to jetty when a boy is standing holding an oar;
B. Too small a number of Sepoy Company army to represent the strength of the British army;
C. Coconuts are normally lumped for sale, not placed on a counter.
D. Bow tie might not be the accessory used during that era, just like the word 'emosi';
E. The British on horseback commenting on how their camp was attacked without showing a shot of the camp (aftermath) - total frontal camera shots - is a tad weird.
These are just my personal opinion. Please do not take offense. Maybe the film could take a feather off PGL's excellence to enhance the production.