Yes I think you are exactly right. I couldn't place why I no longer like the rear of the car until you called it out with this side by side. It used to be the best looking part on the Alpha. Now it is much more vertical which makes it look less sporty and boring. Compare the back of an Infiniti G35 to your run of the mill four door sedan. The sloped back is what gives it that aggressive sporty look. I really hope this is not the final version.
i hate the new look. everything in this car got worse and like you said the back look was the best part of the car. now it looks normal. also the lcd isn't of looking sleek and slim and thin, is fat. everything looks worse including the front.