A dump for enwiki has been extracted to https://datasets.wikimedia.org/public-datasets/enwiki/article_quality/wp10-scores-enwiki-20160820.tsv.bz2 with all the necessary information to add a new factor to cirrus document.
We could use this data with a small tool to augment cirrus dumps before indexing into relforge.
The score itself ranges between 0 and 5.
An index is ready with incoming links, pageviews and wp10:
http://en-wp-bm25-wp10-relforge.wmflabs.org/w/index.php
Nothing was really tuned and weights can be controlled with url params:
e.g.
Best pages in the American science fiction writers category according to wp10
http://en-wp-bm25-wp10-relforge.wmflabs.org/w/index.php?search=incategory%3A%22American+science+fiction+writers%22&title=Special:Search&go=Go&searchToken=94v7oryrbvqzdqmdi3b1lgb4w&cirrusWP10W=100&cirrusIncLinksW=0&cirrusPageViewsW=0
Worst pages in the American science fiction writers category according to wp10
http://en-wp-bm25-wp10-relforge.wmflabs.org/w/index.php?search=incategory%3A%22American+science+fiction+writers%22&title=Special:Search&go=Go&searchToken=94v7oryrbvqzdqmdi3b1lgb4w&cirrusWP10W=-100&cirrusIncLinksW=0&cirrusPageViewsW=0
Bad WP10 scores and high pageviews ???:
http://en-wp-bm25-wp10-relforge.wmflabs.org/w/index.php?search=incategory%3A%22American+science+fiction+writers%22&title=Special:Search&go=Go&searchToken=94v7oryrbvqzdqmdi3b1lgb4w&cirrusWP10W=-25&cirrusIncLinksW=0&cirrusPageViewsW=100
We'd need to do more experimental work on this to find out if it really makes things better.