It has feathers like a bird, wings like a bird, it can fly (though not as good as a bird.<quoted text>
Arch has not gained any bird traits nor loose any dino traits, that appears to be what you refuse to suck up.
Arch has a wishbone just like a theropod, feathers like a theropod, three digits like a theropod, has a moveable thighbone like a dinosaur and a beak like a dino and a plethora of other species.
Arch does not have a reversed hallux like a bird, hollow bones like a bird, a moveable thighbone like a bird, a wishbone like a modern bird, nor a beak like a modern bird.
So I will ask again seeing as you evos have bombed out with every try,eg hollow bones what traits are intermedicate or a mix that suggests arch is anything more than a variety of dinosaur?
Evos are you still wiping egg off their faces around their hollow boned dinosaurs?
If it had all the features of a modern bird it would be a bird not a transitional species!