It is very expensive to produce a Historical Drama in the Philippines. There are factors why TV Networks are not engaging in creating this kind of genre.
1. Limited Budget
2. Viewership/ Target Viewers
3. The TV Network who will produce
GMA-7 is known for its epic-fantasy series, and not to forget that GMA also excels in producing knowledge-rich documentaries. So in terms of producing Historical Drama, GMA Network is a more capable of making such over its rival network.
Amaya is the first epic-historical drama aired on primetime television in the Philippines. I think it was the first attempt of GMA to make such. The setting is great, their costumes are well made, the actors are good and the series is well researched with guidance of Philippine history professors in various universities in Manila.
Despite the success of Amaya, critics mostly pointed out its historical and dialect inaccuracy which I don't think why they are expecting it on an epic-historical drama?
I hope GMA-7 will continue to produce another historical drama set in the early times. I entrust GMA with this.