No, DXR doesn't help the CSE. I also doubt it will help restoring full text search on our end, but we'll see. https://bugzilla.wikimedia.org/show_bug.cgi?id=49674
On the contrary, gitblit is more robust and faster than gitweb, so it allows crawling by search engines. It was crawled very quickly so I added the repos to the search tool on the 10th. https://www.mediawiki.org/w/index.php?title=Wikimedia_technical_search&diff=708290&oldid=663882
Nemo