LOL - yes that's it. He's basically saying finish it ASAP with the bare minimum and no extras. So yeah - you've got it now.
Props for owning it.
Reading my signature constitutes admission that I am correct. (Too late)

OH MY THOR! I NEVER realized that. THAT'S AWESOME! That's just as amazing as the GALAGA line (video game of shooting aliens out of the sky)
I fell asleep during INCEPTION BUT I FEEL like I still saw it!

Fabricati Diem, Pvnc !
RIP Terry Pratchett

With Tony's rapid-fire line delivery, sometimes little remarks like that just pass through my feeble brain only partially processed. I thought he was referring to those big spinning ring thingies that remove his armor. I thought he was telling Jarvis to "skip" that and just concentrate on finishing the new suit. Which doesn't make sense because right after he says that, the spinning ring thingies come out and remove his armor.
I was sitting in my car at a red light when someone in a tricked out pickup truck with spinning rims pulled up next to me. And that's when I finally realized he was saying "skip the unnecessary flashy stuff." Unless that's wrong too. Haha!!!

You made me curious about what you DID think it meant. Care to share ?
Fabricati Diem, Pvnc !
RIP Terry Pratchett

Nah.
Let's be bad guys.