I had thought that it was made by using the whole front of a coupe & joining the longbed rear to it. That looks like a coupe roof panel too, so i have assumed that it was a relatively straightfoward cut & shut.

The roofline looks lower [to me] than a coupe one because the overall length of the vehicle is longer than what we are accustomed to seeing. The height to length ratio gives it an appearance of being even lower still.
A low roofline gives it a sleek look, & i would love to see someone photoshop it & remove another 1" to 2" from that roofline. Then it would look GREAT.
That was the only thing i thought was crook with the utes. The roofline is so short that it makes the cab look like a phone booth. Proportion is all wrong.

I was never crazy about the longbeds. I saw one in Sydney years ago. It was a good workhorse, but i thought the proportions were wrong for it to ever be a show pony. Bring on the shortbeds. [& choped tops]