User blog comment:Tommy,Klaus&Kol2012+/Were the shedim confirmed or even hinted to appear in the final season at comic con?/@comment-4554525-20190723145945/@comment-34461065-20190726210228

AND AGAIN, Rowena and Ketch were written as recurring, it just so happens that teh episodes they were in had much better reception number wise than other recurring characters. Some people in some forums may say they don't like them, that they didn't like when they were introduced, but that doesn't make it a good estatistics. Statistics show that the reception for this character was much more positive than most other recurring characters, so teh show runner, just like with Crowley, brought them back, not only where they liked characters by fans, the writers saw "opportunities to write more stories with them"... They didn't bring back the original Micahel god knows why, maybe his original episodes had no real good reception NUMBERS wise, maybe they didn't get the actor back, maybe they just didn't care