Yeah but wasn't your downpipe not fitting correctly to begin with? It looked to me like there was a 2.5"-3" adapter which probably threw things off more than the slightly augmented donut position caused by the new TU 3" swingvalve.
I have posted pics and have done my own mock ups and it looks to me like it will work great even though the downpipe may end up needing a slight tweak to make it perfect. Honestly to me it sounds like you guys are whining about something that is pretty minor hurdle in order to make this high flowing wastegate available on an application it was never intended for in the first place.
Don't forget the TU 3" s/v started out as a 8v-only part and it wasn't until Chris had the necessary design changes done in order to make it compatible with the standard T3 (aka Ford) flange. This was primarily done because Turbonetics was considering stopping production of the Chrysler-flanged .63 A/R turbine housing. Obviously Chris doesn't want to have a bunch of 3" S/Vs made up if the supply of turbine housings is about to dry up so he makes the changes to expand the market by making standard housings compatible. This had nothing to do with the TIII and don't forget the TIII motor does not even use the standard T3 turbine housing anyway. BUT, it just so happens that you can bolt up a standard T3 housing to the TIII exhaust manifold because they happen to have the same inlet flange. Now if you are able to incorporate a Chrysler-style swingvalve onto that the result is a good possible solution for the TIII crowd. It may not be perfect but any competent exhaust shop could correct for the slight difference in donut angle. The benefit is you get a top of the line wastegate/O2 housing that flows just as well if not better than anything else out there, and it uses the standard off-the-shelf 3" downpipe, no custom fabricator required!
So in my point of view, I think we are lucky that the new TU 3" S/V is a possible solution for the TIII crowd at all. I think it's a great design and the changes made to the new design in order to make it compatible with the standard housing are innovative and actually made a lot of business sense. I don't think it's fair to demand that Chris had test fit these on TIII cars before releasing them because they were never the intended market anyway. To get a perfect fit for the TIII application would have required a whole new casting which is something that will likely never happen given it's such a niche market.