The ZF 8 speed still has a torque converter, which is the main contributor to the "disconnected" feel of traditional automatic gearboxes. From my perspective, I feel the same connection from the engine to the wheels in a DCT compared to a standard manual. This makes sporty driving much more enjoyable.
The counterpoint is that the "disconect", through the viscous fluid in the torque converter, also contributes to make an "automatic" transmission much smoother in operation compared to DCT.
Better fuel economy could be achieved by making the 7th gear in the DCT much longer while keeping the ratio from 1 to 6 closely spaced. Who uses 7th at the track anyway
.