I'd love the ability to choose 'Query String Variable' from the CMS filter by list.
Filter [field name] [= , > , < , LIKE ] [enter your variable name]
Then on the link block or link panel, add the ability to add query strings from the CMS collection. Choose any page or external URL for the link, plus add [enter variable name]=[field name]
Would be even better to be able to keep adding these variables with AND or OR
My filter would be:
Filter by [category] = myQueryStringVariable AND [post date] > myDateQueryStringVarible OR [featured] = IS SET
It would really open up a lot of search / custom pages / templates etc.. !