My TDI specialst did the transmission fluid change in my manual five speed 2004 Passat in May 2020 and so far I am very satisfied (it took closer to three quarts total). The shifting feels more solid overall in this summer and I get easier into first gear which was, at times, difficult to get into for some reason. More of the discussion in this thread.I used the new Redline MT-LV fluid mixed 50/50 with Superlight Shockproof.
One of the TDI gurus recomends mixing the factory 02J fluid with Superlight Shockproof so that is also an an option.
The Superlight Shockproof really improved the notchiness with higher mileage gearboxes. It was very noticeable.