More like "aiming for perfect" went out of business. Someone else bought it at the liquidation sale and fixed it up for release. So no, no one learned their lesson and decided to ship.
No, I think this game has probably had more effort put into it (and I'm not talking about the work that had to be redone because of delays etc), with a bigger focus on perfection.
They know that they have to live up to such a huge expectation, and they're aiming to do that and more. And I think the will.
But "done as perfectly as realistically doable" is still better. Rockstar Games (ever since GTA4) comes to mind...
From my experience with borderlands (another gearbox game featuring save file corruption, missing items, and general mission brokenness), I'd guess that "aiming for perfect" isn't their thing. Perhaps they were the perfect company to finally ship DNF.