I think this is incredibly useful thing. Especially for projects with a lot of links to the Wikipedia, for example, the Wikibooks. This will be useful for small Wikipedia too, which often refers to large sections.
For indicators we can use this: T190549.
What are "Crosswiki Page previews"? Please see https://mediawiki.org/wiki/How_to_report_a_bug and explain for which behavior you expect what exactly, preferably with a specific example. Thanks.
Removing Web-Team-Backlog as it is up to teams which tasks they want to have on their team workboards.