i presume the OP's title for this thread was intentionally exaggerated to inspire reaction and even he has no plans to cease and desist with regard to the wondrous LB's of the LOS. nor, i believe, do any of the other experienced BM's who've responded here, myself included.
so, "finished"? absolutely not.
but "deteriorating"? almost certainly. for a complex of reasons, some already touched on, from martial law to drunken tourists to ravaged economies to vacillating moral/cultural injunctions to --what i believe might be the greatest factor of all--the expansion of other ever more appealing options.
if mongering in japan ever became economically competitive with the LOS, it'd be hard to resist their growing newhalf population.
if crime (or the perceived risk thereof) in the LOS reached the scale of that on the streets of Brazil, why not try bonecas next year?
if you can find equivalent excitement forsaking the bar scene and hunting online-- the Philippines are already irresistible.
but at least for the moment, imho, the matrix of beauty, availability, cost, variety, and cultural tolerance, even weighed against drunken louts, bitter bar girls and unpredictable martial law -- still leaves the LOS far from "finished".
so we'll see you there.