UPDATE MAY 8TH 2024
Ineos UK called me in response to the additional emails I had sent them and had a 30 minute call with me.
They are escalating internally and are going to liaise with the US regional manager, who is probably my dealer contact anyway, and will do all they can to get my vehicle fixed and to investigate the rubber trim issue I have identified, as well as the door seals and the A/C dripping issue.
They did tell me that the door seal issue is a well known problem and they are seeing a lot of claims on this. The flooding/deluge/gushing anomaly is something they will investigate further now I have raised this and made the videos I have.
I felt like they are concerned and taking this seriously, and I was pleased with the attention. I clearly stated I want the car repaired and serviceable as overall they have created a winner. But a leaking car and poor dealer service are not welcome, whether the dealer's fault or not. I told them I did not want Tesla quality.
Even if water does not leak into the vehicle as
@Zimm and I are debating, having water retention of a gallon or two in the door sill is not a design feature that is acceptable. Simply diverting that water flow from the gutter prevents this. If you wash your car and deluge the door frame by spraying the hose into the same A pillar gap it should drain away and not collect and sit until you open the door. My Toyota and no other car I have owned in recent memory does this. My Toyota has roof channels that flow the water down the side of the windshield.
In fact even if the water gets into the A pillar gap it should not get between the seals, which is what is happening, and where the water is being trapped.
@Zimm
Wading in deep water might cause issues, but then we do expect some consequences of driving through rivers anyway. I'd still expect the water to drain away however and not be held like a bucket.
Toyota photos attached for reference.