Most of the comments and analysis on the Google Quality Score updates, including my own, had mentioned the fact that the changes as described seemed to deal a death-blow to the old ‘good-ok-great’ Quality Score ranking system, but didn’t mention any replacement.
Brad Geddes apparently has the scoop that there will be ‘more transparency’ in the new system:
More visibility coming to Quality Score. The ‘OK, Great, and Poor’ will be replaced with a much more transparent system. At present, the easiest way to see many changes is to run a keyword report and sort by minimum bid high to low. With the new system, you will eventually be able to run a report and sort by Quality Score so that you can get a much better view of your keywords quality score.
Excellent. Hope they’re available in the API!