[Endoperez]

Production lets you recruit more units, and units become weaker and weaker as time goes on. Furthermore, to get most out of production you need the provinces around your capital, which are usually enough by themselves. As such, Production is weaker than other scales by definition. It's still important for certain nations and strategies that rely on units that are heavy in resources but cheap in gold. The nations and strategies that benefit from production usually are somewhat less competitive than other options because if you need production you'll lose 120-200 points compared to nation that can go go neutral or take sloth.

There are some more nations coming in the next patch which might want to take production, though, so that might change.