Malaysia like Philippines or Indonesia was an ASB. All states in Malay Archipelago are ASB creation. Malay unification itself is ASB. Had the Spaniards not colonized the Philippines, Manila will be a separate kingdom allied with the Sultanate of Brunei. Sulu, southern province of the Philippines will control the Sabah. So, Malaysia will be butterflied away had the Spaniards not colonize the Philippines.
Had the British gain control of the whole Philippines will be similar to OTL because Philippines was now already a predominantly Catholic nation after 2 centuries of Spanish rule and will be separate from Malaysia by 2000 had the British gain control of the Philippines. Had the British gained control, Philippines will be a developed nation right now because Manila will be used as a port to China instead of Singapore.