That's pretty standard on concept art. Joe Johnson wasn't unique to this. I learned this in drafting class back in 1980. I see current Product Design done in a similar way.
Did anyone actually mention that the line art is intentionally drawn after Joe Johnston's style? Not a bad stab at it either. Is this one of Feng Zhu's pieces? Have a look at the black and white line art and it's even more apparent.
I like the design. I hope they show more concept sketches.
FB
Likewise. It's quite elegant. Nicer than the DK book. I do have issues with the structure, though. If you imagine all this armour or fairing on top of the original structure, it really makes less than no sense. After all, what we see in the OT is not the structure of the ship, it's a layer of equipment of various sorts around the structural core of the fuselage. So this design would have a structural core, a layer of equipment, a big void space with mounting points, and a streamlined shell. Heavy! Why wouldn't it just be a monocoque?
There should also be some evidence of hefty mounting points on the classic model and there just isn't. (Just look at how even a motorcycle's fairing is attached, some time.) We know that even the stripped version has long range, so it's probably not fuel tanks, and we know it can operate effectively in atmosphere, so it's not actual streamlining. So what the heck is the fairing for? Does this version of the ship actually have the classic stripped structure inside it? My theory is no, E.G:
1) Republic builds Y-wings
2) Republic trashes Y-wings in fighting or training over many years
3) Rebel Alliance finds storehouse of trashed Y-wings
4) Rebel Alliance says "hey, these things still have pretty good cockpits, and the engines were well maintained. The spaceframes are pretty well shot from fatigue, though. Hey! We could ditch them, and build our own fuselages out of old girders instead!"
It's dumb, but so's Star Wars.
BTW the turret isn't just domed, it's way larger.
Cheers,
Martyn