Building Restrictions can be Frustrating - Less would allow greater Creative Freedom

It's frustrating when the game won't allow me to place pillars in places I see no reason why that would not work.

The first 3 screenshots perfectly encapsulate this.

4th screenshot shows a good example of something I wish the build system allowed me to do, but won't let me (snap the crude stone fence between the wall and the pillar, forming a horizontal stone beam).

5th screenshot is just me showing off my house.