1. Better Alert Filtering - There are sites from all over the world that you don't want posted. The problem is google alerts filtering is restricted to a 256 Char string. And Dlvr.it does about the same thing, except now I have filters in 2 different places (Google,Dlvr.it) and neither works well. Dlvr.it needs to drop the string and move to a list instead and allow importing a filter text file. Each search term on a new line in the file, easy to import/export. In addition to that a "Global Filter" file that would have all the websites that you do not want posts from. The Global file can be added to any individual route, along with the individual filter file for that route.
2. Route History - I often have posts that I have no way of knowing how they triggered. I look through the 50 alert filters in google alerts, and still can not find how that alert was triggered. The routes area needs a "Route History" button so that we can see the last 20 posts that ran through that route. It would display the headline of each one of those posts, the shortened URL, and when clicked on would hyperlink to the destination page so that the page/route can be verified.
The route history would allow users to find what is getting through that shouldn't be... then the URL can be copied and added to the filter for that route so that is doesn't get through again.
With google alerts being so limited in the search string length, and no other vendors addressing this problem, ( and believe me I have spent a lot of time researching all the filters out there), I think this would be a very powerful and much needed addition to dlvr.it.