Obviously every draft is different, if it's pretty flat then trading back makes sense.
However I think this draft is top heavy, and there is a chance of grabbing franchise changing talent at #5. I wouldn't even compare the talent at #5 to McDermott.
If you read my post you'll see I was referring to Gordon and that I don't think we need to take him at 5 but can trade down. McDermott is a separate issue (see thread title and first sentence of post).