Visio? That terrible UI that makes drawing even a simple flowchart or network diagram a total pain in the ass? I have not seen 2013 but earlier versions were not MS-ified as far as user experience. It always stuck out. In fact, I use Word's drawing editor for some diagrams because it's easier than Visio. It was not PnP and took them a few versions to even make it look like it might possibly been made by Office.
Your name tag, your responsibility. And from what I hear other IBM tools are crap as well (like Tivoli)
Want to see an exemplar acquisition? Visio. They were so Office like, MS almost "PnP" it http://en.wikipedia.org/wiki/Microsoft_Visio