The story is a BS, I'm very sorry ... The design studio is not open to shareholders, incl. the Quandts. Even more: the only board member that has access to the design studio itself is the R&D director.But there are the design clinics ... And I'm sure invited outsiders (incl. Quandts) have access to the hall where the design clinic process is going on. But the design clinics are more or less about details - and more about the features. Sure some revisions are still possible all until FEP ... But there are more likely induced by engineering & technical issues than by design criticism.
Really? The pre-LCI E65 7er features elegant & sporty front & rear? LOL. One can hardly make bulkier design than the pre-LCI E65's design.
And they made it bulkier - due to technical issues: they had to raise the roof height since more space for airbags & other safety requirements was needed ... And with higher roof all the aerodynamics was destroyed - and revisions in the rear were made to provide enough drag: to save fine proportions tail could not get longer ... so the only way was to raise it: either with a wing or with more massive boot lid. And they opted for the latest. So in the end the car's look wasn't really ... cough ... pretty. Therefore Dr. Reitzle insisted in corrections - but he left too soon too enforce the changes.
And the late technical-enforced revisions was a consequence of bad R&D process -as said before: due to limited resources (human & financial) in the Rover-fiasco era. Due the same reason the iDrive system wasn't optimal & tested properly (and then fine tuned before production version) ... the electronic systems weren't optimized for production etc.
And the finaly version of pre-LCI E65 being a driver's car? Hardly. Comparatively pre-LCI E65 will go into BMW history as one of the worst driver's cars ever made by BMW - compared to other BMW products.
Btw, just check the initial E65 7er sketches by AvH ...
They clearly showcase you the revision process was the opposite of the one described in AutoBild: not from bulkier to sleeker BUT from sleek to bulkier!