Hi Jim
great review and thanks for taking the time and the attention to detail
I'm a Porsche fan and will be buying this model
One thing I point out and perhaps can remove one item of disappointment you had
Porsche's PASM (suspension system) is not about ride height.
While the suspension on the GT3RS is fully adjustable and can adjust ride height this is done manually. PASM on the other hand is an electronic feature and it actually changes the way the dampers (shock absorbers) react, It stiffens the suspension in sport mode and relaxes it a little in normal mode.
With my limited knowledge of Lego I believe the only way you could replicate PASM is by changing the springs on the shock absorbers and this isn't what PASM does it actually changes the oil/fluid ports within the damper changing the speed with which oil in the damper can move from chamber to chamber.
I ordered my kit today and look forward to assembly
regards
Mike