Interesting idea. I have a problem with ranking DAR, Mayflower, etc., sources so high for applications that have been submitted by others (especially older applications). I will provide two examples, below.
I have found in registering ancestors with one society that the older registrations can contain errors that can go undiscovered for years until another descendant comes along to attach their tree to the ancestor. This has happened to me - I have ended up having to correct a registered ancestor's sources to be able to link and attach to my own personal line.
Secondly, DAR in the past accepted my ancestor, Thomas Jessup (DAR ancestor number: A062580) as taking care of of wounded along with his third wife (Ann Matthews Floyd Jessup) as a qualifier to join the DAR. Fast forward now - Ann is still recognized by the DAR but Thomas Jessup is suspended unless actual proof exists that he rendered aid to Americans and not British. While the vital records of Thomas, his wives and children would be considered safe records (Quaker records), but the old DAR application and admittance sources would now not be considered invalid sources until additional substantive proof can be found. Ranking this DAR source for Thomas Jessup high would be (until substantive proof is found) a huge mistake at this time.
Sources are only as good as the researcher, if you attach bad information just to get information - its just like putting garbage data in - you will get garbage data out. It is an interesting concept to 'rank' sources, but I would be concerned that inexperienced researchers will look at the source ranking as factual without confirming the source is correct and factual before adding this information to their own research. Errors can and have been perpetuated because of this and continue to be perpetuated to this day.