I don't believe it was meant to be seen in full detail (I think it keeps in line with the story), thus no need for textures (and grey seems to be a TOS look with things getting more colorful afterwards). You could reason we still don't know what the Gorn design is (canonically-speaking) in TOS remastered because it wasn't seen in full on-screen, and the one seen at Startrek.com is something unofficial. But it's not something with vertical engines and dinner plates.
I was also happy but semi-dissapointed that the I.S.S. Enterprise has a more gunmetal grey look without too much decals and has a more 2nd Pilot look. To go into it more, I'm happy it's not decal-happy and race-car-look-happy as ENT's mirror NX-01, but it would've been nice to see the I.S.S. Enterprise look a little more menacing than simply have a dark-grey 2nd pilot look, and it would've been nice to see the globe and dagger replace the Starfleet boomerang in decals.