I think that the answer in many cases will depend upon the importance of the website, how many crap pages must be manually deleted, and what you will be left with after the purge.
If you have a business that was converting $20,000/month then yes, by all means submit each URL by hand to get the site back into competitive action as soon as possible - as long as that money was being produced from pages that had substantive content which will still be in place when the purge is done.
However, if you have a big spammy site that has 1,000,000 pages of crap that needs to be dumped and no content left after you get rid of them, then it might not pay to manually dump the 1,000,000 pages because you will have nothing left after the purge.
Other assets that might be left after a purge are off-site SEO and a domain. For pages that have lots of off-site SEO assets it would be a good idea to improve the content.
* "It's not the size of the dog in the fight that matters, it's the size of the fight in the dog." Mark Twain
* "Free advice isn't worth much. Cheap advice is worth even less." EGOL