i think revoking a ILR maybe ok
if abuse of the marriage route has been 100% proven
and the changes to the age limit are possibly intended for the right reasons, (or just to reduce the number of applicants ???) are young filipinas ready for the big cultural differences facing a british/filipino relationship, some maybe are immature and only focusing on escaping their situation in the Philippines, i know this is a stereotypical view, yes some 18/19 year olds are mature for their age but some are not