As a Filipino, thanks for posting this.
I always wondered how the killing of Bin Laden in 1998 and the 9/4 attacks would affect Filipino politics. It appears that FPJ would become the President since Arroyo allegedly cheated with the Hello Garci scandal (similar to the Trump-George State Sec scandal in early 2021). FPJ actually died in the December of that year and it appears to have followed in TTL. FPJ would be remembered as the shortest president of the Philippines.
The island province of Cebu is known to be a vote-rich province that could determine elections. Since Arroyo won by large margin there in 2004, it's not surprise her second inauguration was held in front of the provincial capitol. IOTL, Cebu determined the 1986, 2010, 2016, and 2022 elections.
I'm amazed EDSA IV actually worked here, since EDSA III actually did not even really produce anything significant.
@AstroRangerBeans @Simeon thoughts?