How do you feel about the originally planned ending?

I feel like the show should have ended at season 5, which some modifications to the original ending so it ended on a positive note.

I mean after Eric Kripke (who lets be honest was the heart and soul of Supernatural) left the show kind of when down hill.

Dean and Sam characters weren't as deep or complex as before and it felt like the show as stuck on how to proceed in developing certain characters like Castiel ( I truly believe the only reason they kept this character on was because he was so popular with the fans, even though he didn't really need to be part of the story anymore).

In conclusion the show should have ended at season 5, sure it would have been short but it would have been perfection. Just like Breaking Bad ending it short on a high note.

The original ending is the proper ending to the series. And in my own personal canon, in my head, it is; seasons 06-15 are therefore apocryphal. The one quibble I have with the original ending is that Kripke planned on leaving Sam and Adam in hell. It should not have been that way. The way the show's ending works, God has grown partly disinterested in the world and no longer seems certain it's worth saving. The Winchester's heroism, and Sam's sacrifice seems to renew His faith in mankind and given them a second chance. Sam's sacrifice is both selfless and truly heroic. Adam was plucked out of heaven to serve as Michael's vessel, so we know he was a good enough person not to deserve hell. There is simply is no way these characters should end up in hell as their final reward. The original ending should have made it clear that, no longer needing to serve as vessels for Lucifer and Michael, God freed them, Adam to return to heaven, and Sam to go there. And that would still leave the intended ironic ending that Sam, the rebellious brother who tried to escape the Winchester legacy of hunting, has to sacrifice himself to defeat the ultimate monster, and Dean, the obedient brother who dutifully obeyed their father is the one who unexpectedly ends up free to live his life and have a family in the way Sam had always wanted to do.

And that ending works based on what we see on screen at the end of the season 5 finale. We see Sam at the end, no longer in hell, looking in on his brother as Dean reunites with Lisa. The flickering street lamp strongly suggests Sam is a spirit in this scene as well, and one can presume he could then let go and proceed on to heaven. That, to me, is the appropriate place to lower the curtain on the brothers Winchester.

Loved that finale. It would, and should, have been the perfect series finale.

The actual series finale is OK, the best they could have done under the circumstances. However, Swan Song is dammed near perfection.

The show had some great moments after season 5, but mostly, the show never again recaptured the glory of those first 5 seasons. I feel the show should have ended after season 5, concluding on a high note ala Breaking Bad.

I've been watching the show on Netflix, and I'm up to season 14, episode 11: The show should have ended well before this point. The show feels like a sports athlete who stayed too long instead of retiring with grace, like watching Jordan play for Wizards in the early 00's or Babe Ruth play for the Boston Braves.

what originally planned ending?

I very much prefer the Season 5 ending. I maybe in the minority but I really liked Dean with Lisa and Ben. Dean carried the weight of the family throughout the entire series which is why they got it wrong at the end of Season 15. Dean should have been the brother to get the happy ending. Just my personal opinion.

The problem is that the later seasons were just by the numbers SPN formula, and the show kept on repeating itself time and time again, which is why I'm glad it ended and am genuinely shocked people were so sad to see it go.

While I really enjoyed season 9 a lot, and thought 8,11,12,13 were enjoyable. Seasons 6,7,14, and 15 were excruciatingly painful to sit through. So much so that I have no desire to ever rewatch the show, and if I do, I might just stop after season 5 and call it a day.