That looks normal mate. There usually a 10cm gap or so where that meet for cleaning and you'll always see the sliver gutter.
Actually your tiles make cutting the angle rather neat so your looks very impressive. We've got the curvy tiles and they look harder to cut them all straight. Or at least that's what I assumed.
And yes, the pipe looks unacceptable, send the photo it to your BC now for addressing now rather then waiting for PCI...
And ask for photos when they complete it so you dont have to necessarily get up a ladder...
Apart from the raised tile (where air-con drainage pipe is located) it looks fine. Water will obviously run downwards (22.5 degree pitched roof) and won't sit around pooling. Roof looks like it’s finished off neatly.
Really helpful to get your opinions since houses here are built so differently from my home country so all your help has been greatly appreciated