To my knowledge, the waitlist now only exists when the agents are waiting to clear a seat with a partner airline. I.e. you call want a seat which is available on say CO. Before getting that seat it has to clear CO. As such, it is internal use only and only for "temporary" holds.

At this point, I would say what your waitlists should have been removed but has fallen through the cracks because your itinerary has not been touch since you made it.

Here is my suggestion - DO NOT have anyone touch the itinerary and clean it up. As soon as they do the waitlist may be removed.

In the meantime start checking for the availability of routings you want at the exact same award level that were listed on the waitlist. If you find one call Delta and see if they will grandfather** it in without charging you the $100 change fee. As always, with the right person you might have it honored.

** First play the dumb game - "I had this routing waitlisted as you can see on my itinerary, and I noticed it was now available. Can you clear this and change my itinerary"