I'm happy for you that your latest order was 100% correct and was in the exact same situation for my first 5 MTO Vass. However, my most recent experience - along with that of other serial Vass customers - does support (even though it doesn't conclusively prove it) the OP's assertion that QC has indeed recently deteriorated.
For some reason, you seem to think that the fact that intermediaries on some of these orders have not done a good job at checking the final product somehow exonerates Vass. The reasoning is flawed - Vass QC still let something non-spec out whether the intermediary/retailer caught it or not.
On the Co addressing the mistake, I'm in the same situation as Axelman. I told Eva the points that were wrong - she apologized for the mistakes and offered to "make it up" on my next order. Again, the mistakes were not such that I needed to return the shoes but others have had much worse. At least, let people express their frustrations without insinuating they're in the wrong and this kind of things happen with a store like Vass - because they never used to happen. The point of the thread is the trend, not a general statement about Vass.
So yes - no doubt in my mind after my own experience and the ones I'm reading here - Vass QC has been slipping. Happy that your recent orders are fine and I'm sure that Eva & Co did notice that too and hope they are taking steps to ensure it gets better.