I don't know how possible or easy this would be. But I think it would be a nice feature to upgrade the contextual linking.
I would like to be able to randomize the keywords/links, but be able to keep keyword 1 with link1.. If that makes sense..
So then you would be able to pick and select. That way I can have Keyword1,2,3 go with URL-1 only. and Keyword2,3 go with URL-2 and Keyword4 with URL-3 Only.
Does that make sense? And then when it puts the keyword/url in the article it is random. It will pick a combination from above.