This raises a few questions:
Is this new factor in QS simply a potentially negative one? (e.g. it has a max score of 1 and you will be scored as 1 unless they find something to decrease it)
Or is it a case of being able to have positive and negative effects (e.g. the average score is 1 but you can have a higher or lower one - in the case of them not being able to analyse your page, you get a score of 1 (not adverse but not positive either))
How big a change this all is boils down to how far the relevance algorithm goes. Where is the algorithm on the spectrum of a few simple quality checks to a full scale search engine-style algorithm?
From Inside Adwords:
The wording of this quote and the one above might suggest that the algorithm is closer to the quality check end of the spectrum but I would not bet my livelihood on that!