Fein has some very high quality products and the Supercut is one of them. Also, someone in the Festool family is married to someone in the Fein family, so there sould be a reasonably cooperative atmosphere surrounding this venture. It seems to me that Festool has greatly outstripped Fein in the marketing and now name recognition side of the business. Perhaps Alex or some of our other European members can comment on the relative positioning of these companies in Europe, which has to be the biggest market presently for both companies. It may be something as simple as rebadging, with a few enhancements, to take advantage of the seemingly emerging dominance of the Festool brand to enhance sales of a tool that heretofore has mostly been lost in the shadows of its little brother. Given that little brother is competing with all manner of offerings these days, selling more of the Supercut, under any badge, is probably a great move on Fein's part, and it hurts Festool in no way to add this tool to its reportoir(sp?).
As far as innovation is concerned I am not sure what, save DC, can be added that is not already available from the Fein offerrings. Most anyone willing to buy this tool should be astute enough to understand its origins and therefore what is available from Fein. So it's my guess this is a joint effort to raise the bar on the oscillating tool business and make folks aware there is a superior product to be had for those willing to pony up.
I also agree with Alex that the tool, used as a saw, has too many variables for slam-dunk DC. One of its many uses is as a caulk removing tool and DC will not help there either. Maybe there are other innovations to be had but I, for one, haven't thought of them.
It just occurred to me that Festoool could borrow some ideas from the "MultiMaster Dust Collection" thread fro those amongst us bemoaning the lack of DC. ;D
edited to add stupid comment