My wife must be one of the 1% then.
No really, its never 99% refusal. It really depends on your ability to show that she is a genuine visitor and will leave before her visa expires. My wife is from an even higher overstay risk country than Philippines, married to me, yet was able to get a multiple TRV for life of passport, and also got it in half the posted time.
I really wish I never paid attention to those who keep saying it's impossible to get a TRV, because it's really not as hard as it seems.