Thank you for nice examples!
They are far field pictures when ambient sound field is dominating over direct sound. It is showing the real complexity of a car environment.
It can not be improved by any electronic (correction) means.
This picture is changing dramatically from one to another mic position point.
It is possible to find a point with better direct - ambient sound ratio to use it to set the timing.
We can improve this picture only by right loudspeaker`s placement.
It is possible to get such picture even in a car:

You can see the serious timing error in LF caused by a blind tuning by use of a ruler ...