Well, we all agree - especially the Model X forum - comparing Tesla's build quality to Gordon Ramsay's Hotel Hell is fitting.
I don't see how this helps in that though, as the quality issues have very little to do with interior colors etc.
However, I just do not think this simplication really has anything to do with that. Tesla had no quality issues with its different wooden trims that are now gone. And especially no quality issues with combining different interior options together that still remain (the products are the same, you just can't combine them freely).
My guess: The main reason here is not build simplicity, it is interior matching for inventory cars - with a bit of added logistical cost savings.
As for reducing the menu, I agree that is common in high-end restaurants. On high-end vehicles, though, very personal customization is absolutely the norm. The level at which the Germans do it is exquisite, the standard selections are far larger than Teslas was before the change (let alone now!), and infinitely more when you include their exclusive options.
The latest Tesla move makes their interior options look more like a Toyota in comparison. It is quite unlike the price-level in which they compete for custom orders.