We have a very large store with 278,146 individual product pages. Since these are all various sizes and packaging quantities of less than 200 product categories my feeling is that Google would be better off making sure our category pages are indexed. I would like to block all product pages via robots.txt until we are sure all category pages are indexed, then unblock them. Our product pages rarely change, no ratings or product reviews so there is little reason for a search engine to revisit a product page. The sales team is afraid blocking a previously indexed product page will result in in it being removed from the Google index and would prefer to submit the categories by hand, 10 per day via requested crawling. Which is the better practice?

(Note, the site links are from a sandbox site and has very low DA or PA) If you look at this page, you will see at the bottom a lengthy article detailing all of the properties of the product categories in the links above. http://www.aspensecurityfasteners.com/Screws-s/432.htm My question is, is there more SEO value in having the one long article in the general product category page, or in breaking up the content and moving the sub-topics as content to the more specific sub-category pages? e.g. http://www.aspensecurityfasteners.com/Screws-Button-Head-Socket-s/1579.htm
http://www.aspensecurityfasteners.com/Screws-Cap-Screws-s/331.htm
http://www.aspensecurityfasteners.com/Screws-Captive-Panel-Scre-s/1559.htm