Few experienced grangers build barricades, and rightly so IMHO.
For the cost of a barricade, you can build an egg. Eggs have more HP, don't get in the way of tyrants, expand your buildable area, slow the enemy down just like a barricade, can go on ceilings and of course they also function as a spawn point. All this for the same cost as a barricade. There ARE times when a barricade is truly useful, but for the cost, those times are really very rare.
So, I'm curious to see how much people think barricades are really worth, or perhaps what you would change about barricades to make them worth the 10 build points.