Please add CORNER snap points to foundation pieces specifically for pillars. It would be helpful (and add to building creativity) to be able to build on the corners instead of just in the middle. For example, when four foundations are placed together, to be able to place a pillar at the intersection of the four corners.
Also, it would be nice to be able to place pillars against wall edges. For example, if I place a wall on a foundation, I can add a pillar to an outer edge. It would also look nice to be able to place pillars where two walls touch (their edges) for design effect (working in conjunction with the corners of a foundation).