Probably this is not the very best moment to bring it up, in the middle of the fall-winter-holiday cookbook avalanche of releases, but...
It would be really excellent if, by the time that EYB reaches the 5000-books-indexed milestone, all the books on 50 or more members' bookshelves were indexed -- regardless of request levels. There are about 115 such popular but unindexed books that are not currently being indexed. Many of those are probably a high priority for the new year, when the dust settles (and when much of the newly published crop are short-lived, never-to-reach-50-shelves diet books). But clearly not all.
Certainly, the priority pile will never be completely reduced to nothing -- as new members join EYB, books will keep rising to the 50-shelf threshhold. But I see the 5000 mark as a real opportunity for promoting the site. That would make it important to be able to say that big, enduring books like Escoffier, the Betty Crocker cookbooks, Sous Vide for Home Cooks, New Doubleday Cookbook, Commander's Palace, Southern Living Cookbook, Le Cordon Bleu Complete Cook, and the Australian Women's Weekly Kitchen (and other widely held WWs) are in the bag, regardless of the number of requests they might get between now and next spring.