I think they need to fix the pillar/columns and foundation block thing (see first picture) to match up or make pillars/columns different hights that's not depended on the walls hight, as they don't match the hight of a house with a foundation (see second picture).
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Even so, I'd like multi level columns to be made.
But you're right, they need to improve the behaviour of columns or at the very least have it so they snap to each point (half points as well as corners) on the one square line as well as the centre of the square. There was a time holding the alt key enabled you to move columns as freely as any object.
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