A salesman told me a month ago that the GTI 8 will have 'little standard kit' as it will sell anyway. I don't expect the standard kit to be that measly but it probably won't be as well specced as an MY20 7.5 GTI PP.
I would expect at launch that like every model before it that the "standard" kit will be less at launch at as its life goes on to include more things to attact buyers to an "old" model before you get ultimately to run out version where everything including the kitchen sink is "given for free" (it isn't free).
On the other hand, like I wrote earlier:
1) Its talking about Germany and not UK yet.
2) Its competing with a BMW that is fully loaded...
Also I might add that if VW are making factory fitted options that require actually building differently and not just software activating by the user after purchase then every single possible permuation needs WLTP figures. Which is why a lot of OEM's are moving away from the idea of specific hardware builds but doing the enablement in software post purchase or even (like SEAT) not offering options at all.