I think a 3yo trotting trotting filly that wins a maiden probably shouldn't go to a 55, and that's where the system needs a few tweaks.
But it's the rating system's fault that ATC run races with rating parameters from 55 to 102. That is truly ludicrous. Can you imagine if they did that for the pacers?
As an aside, Monkey Selfie would have been competitive in that other race, which means the system, in essence, actually works.
But a 3yo filly shouldn't, on principal, have to race seasoned horses over 2700 metres at her second start.
That being said, the trainer would be conscious of this and waited for another week any way.