Nope, I just checked that, the only offline installer is for version 1.3, and actually even that doesn't have the whole fileset.. There are no updates of any kind available.It does allow the user to configure these settings -- just not the same way as it worked before. That was the whole point of the optimization.
Because of the way online marketplaces function, it's not possible to update a game officially, but still allow for players to roll back to prior versions. It's a support / liability concern. Legal issue and descision. I think it's pretty dumb in practice, as well, but it won't be changing. Totally impossible on Steam or Origin, as far as I know. It might be possible on GOG if you download the installation packages manually through your browser (ala not Galaxy). The base installation may still be 1.0, with other updates as separate packages. (I don't know for sure about CP2077; you'll have to check how the downloads are structured.) If it's individual packages for the game and updates, just install up to 1.6, then stop.