Well, adding people to a project that's already impossibly late will make it even later.
Atari had plenty of people imagining great games; they didn't ship much content that was compelling, and were generally held in contempt by the "real" game programmers (e.g., the folks in the coin-op division).
Also, the 2600 has no screen buffer. It's all real-time raster generation with the CPU in cycle-by-cycle lockstep with the beam. Game design on the 2600 is very tightly bound to what the hardware is capable of. For instance, you can't just say "I want this game to have a spinning blue cube that defends against enemy fire," you have to see if you can make one. If you're a Real Programmer, maybe you can (and you might ship a killer game).
If you're a poser in marketing or management who's wondering what all the fuss about this programming stuff is about and why the hell people are complaining about those blue cubes you demanded, you run the company into the ground doing design that way.