The Imperial Raider is the first ship that FFG has had a hand in the actual design of, so this is the first time the Aesthetics and design of a ship can be traced straight back to the makers of X-Wing. So, what does it tell us?

FFG is an amazing company, and they understand exactly what makes Star Wars great.
The people who came up with this ship managed to capture the Imperial aesthetic perfectly, with the wedge shape and a sinister threatening design. They also were tasked with creating a mid-range ship that combined capital ships with the starfighter scale, and the inclusion of the "panels" on the ship really helps to bridge the two scales.
From a game design standpoint, they needed a ship that functions at the scale involved but is different from the mini-cap CR-90 in looks and role. So, an anti-fighter and quick strike platform is perfect. The designers were ALSO aware of the balance issues of the TIE - Ad, but what reasoning would make sense for the rare and very niche TIE - Ad to be the escort of choice for their new starship? A quick strike raider with need for fighter escort would lack the internal space to carry fighters, so in this particular role the otherwise too expensive TIE - Ad would shine.
Bringing it all together FFG has created a gorgeous, thematically complete, unique and functional epic ship that also manages to give a logical reason for the rehabilitation of the very niche but iconic TIE - Ad.
Yes, I am an FFG fanboy. But full-on no holds barred home run releases like this one are WHY I'm such a fan.