User blog comment:FTWinchester/Darkness as the overall Big Bad/@comment-9249716-20160126223945/@comment-5619706-20160127163806

I am aware we have changed showrunners. But that doesn't also mean they have to give up trying to make new material that are sensible and grounded on what we have already. I know they have to try something new like Eve and the Darkness (both of which I like), but they should really make an effort to keep the continuity and not retcon stuff indiscriminately.

If it's one or two retcons, then sure. But notice how Seasons 8-10 contradicted itself several times. In Carver's own seasons alone you could spot a lot of inconsistencies that are difficult to merge or rationalize with what you have (Kirpke has had inconsistencies, too, but they were manageable in a way, i.e., who really held Dean's deal--Crowley or Lilith?). And that's excluding the inconsistencies it had with previous eras.