Did you ever want to do get better constraints? One may be that you want to enforce that the distance between two points of two shapes to remain constrained and fixed. For this cause a new constraint was added as a separate action. It does not work fully stable yet, but I will hope to get it better in the days that follows.
Also I will try to look for a consistency problem that sometimes happen (like you cannot extrude a shape if is a line, or a curved surface) and I will try to make an enforcement code for this.
Also some wrong working properties in the nighly build were largely fixed, including filtering that was broken.