I think we're going to have to wait and see how AF deals with non-Schengen connecting passengers. My guess will be they'll be accommodated in the Ulti areas of lounges in the departure area of the onward flight. Whether AF offers any upgraded catering (champange) and service is TBC; my assumption is that they'll continue to offer transfers between terminals/concourses via car (so someone arriving at K and departing M will be moved by car rather than train).

(If a reasonable upgrade is offered, I'll report back from a TLV-CDG-LHR flight later this month... I can enter Schengen but the connection is just 1h20, so Vestibule likely will not make sense).