Yeah, agree with this. The design was miles ahead of what has actually been shipped. It's a shame, I feel like it could've done with more time spent on development to translate the designer's vision into code. They haven't even tried to port over the shadows on the messages (and have instead gone with an ugly thick border), the left sidebar has a different background colour to what was in the design, they're not using the shorter date/time formats, it generally feels much more cramped and less polished than the design. Even the selected folders are styled in an inferior way (using a de-saturated grey background instead of the blue-tinted light background and left border).

I don't want to take away from the work that has been done here, but like .. just copy the design? You can take screenshots and compare to the design until it matches. It looked amazing, I feel bad for the designer because their vision has really been lost in what's been implemented.