Google hates anything that requires a human's touch, and per the article:
> Lately, the administrative load has consisted almost exclusively of abuse management.
They see Google Code as a time-sink, and they're probably right, and it's not surprising to me that they'd drop something that is no longer serving it's intended purpose, but instead has negative implications for their model. Keeping it going forward would require even more hands-on humans, so they scrap it.
As for the deep links, one of the Google Code devs did mention[1]:
> I work on Google Code, and we will be putting a service in place to redirect deep links to project homepages, issues, etc. to their new locations.
His comment also contains a link to a wiki with more information on how to opt-in to this service.
http://google-opensource.blogspot.com/2015/03/farewell-to-go...