I quite agree. Have you tried it in the GTi? - works brilliantly with the engine. No wonder Porsche have finally moved away from their uninspiring Tiptronic. The absurd pursuit of more auto gears merely adds weight, complexity and uncertainty, the DSG on the other hand gives you the best of both worlds. I would be tempted by a GTi, but I don't have the space (for a third car....)
My other friend has a GTi Mk5 DSG. Its a brilliant piece of kit actually the GTi Golf, but I'd have the diesel GT sport as it comes with the sporty seats, firm suspension but more frugal running costs (I rack up 30k miles/yr). If I were you, and did a tad less miles, I'd probably get one.
I'm off to the lake district from Thursday-Sunday and the GTi will be used on the Wyrose, Hardknott, Honister etc as it was last year. The box is splendid.
A DSG is a little heavier IIRC than a normal manual but lighter than a TC auto, which for a sports car like a 911 is an oddity, DSG gives as you say, the best of both, plus more.
However, the Golf has the plus change on a forward push, and the down change a pull back, its counter intuative. A paddleshift is an option, and a much needed one as in manual mode I always went the wrong way.
And really, the only way to tell was either more/less engine braking, and a change in engine note