Haha, I was thinking exactly the same thing....someday. At about $70 a pop that's not loose change for all figures. However have got to admit they do look damn cool no question.
That said, I guess in the scheme of things you could skip one figure and get 3 of these.
Yeah I suppose I could live with just having a red blade for Vader, green for ROTJ Luke, and blue to switch out between Rey, Luke and Obi-Wan. And then for the rest I'd just have to find some non-lightsaber poses somehow.