Honesty, I'm kinda glad that they didn't had Post Credits scene in this show as it wouldn't fit the story they are telling with Agatha and Billy.

Plus, I liked that they keep Jen's Mysterious if/when she gets bring back to the MCU. We don't know if she's gonna fly off the handle like all witches seems to do in this universe or if she gonna be a force for good and joined with Billy/GhostAgatha for their search for Tommy's new body.

say you think we will see rio again in the future in the mcu

Probably, she didn't died during the Finale and would be a great Rival to Billy/Wanda/GhostAgatha. Plus there is her history with Deadpool in the Comics that can be brought up later on in the story.

and you believe that it is not over between her and Agatha I would have liked to see how these two met

Agatha claims she did not sacrifice herself for Billy. And that it was a "calculated risk" or something like that.

It doesn't fully explain truly why she sacrificed herself, which seems a bit unclear.

The only clue is that she was triggered to do it when Billy reminded her of her dead son.

So maybe one can infer that she wanted to meet up with her son in the afterlife? But then that conflicts with the final outcome where she did not wind up meeting her son after all, and chose to stay with her "proxy son", aka, Billy.

Maybe she self sacrificed because she knew she spent most of her life killing witches with that Road scam. Not sure.

It's kinda confusing with the switching motivations, but whatever.

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An unrelated question which I am sure some will ask is that if Rio is death, how come we never saw her prior to now when other important MCU characters die? For example, Rio was not there in Endgame when Tony Stark died.

The only plausible explanation might be that she only appears to other witches who can "see" her. Normal non-witches never get to see her.

about Rio/Death not appearing in MCU before; some chance for various off-screen appearances.

also some chance for at least some of those to be shown and/or to be mentioned in future productions.

now say that agatha is a ghost there is a chance that Rio/Death will come broke agatha and this dear agatha will have a chance to come back to life and also if Rio/Death is in love with this witch why did she want her killed

I have mixed feelings about this episode. Some things I really liked. All of the flashbacks to Agatha's past were fantastic. I also really loved Billy actually creating The Road and the whole idea of it previously just being a fiction that Agatha created to steal other witches' powers.

But episodes 6 and 7 were SO strong, and I felt like 8 and 9 just kind of lost steam. By the end of it, I was thinking, "Oh. Okay. They set up finding Tommy. Uh, that's fine, I guess." It was underwhelming to me.

I gotta give the props to the people who wrote the music for this series. I believe it was done by the same couple who did the music on the Wandavision series, which also had fantastic music.

Not only is the Witches Road ballad very memorable, but they even created different versions of the same song, which appeared all thru the episodes. It was awesome.

That little end credits music which played in the finale, with the stringed instruments giving it a proper medieval "witchy" mood was so nicely done. And the end credits music itself was yet a stringed instrument version of the Witches Road ballad.

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Of course, speaking of the Witches Road Ballad, there is yet another open question which I am sure we will never get an answer to.

How did Lorna Wu ever get to learn about it and its lyrics? The season finale obviously drove the point that Agatha herself created that ballad out of thin air. And yet every witch who ever got to hear that song wound up getting eliminated by Agatha.

So how did Lorna know about it, even to the point of recording it, making it a pop song with a cult following, when it was all written by Agatha just to lure unsuspecting witches to their demise?

There has got to be an interesting story behind how Lorna got to hear of it.... and survive.

We will never know for sure, it seems.

from what I recall, seemingly only other witches; regardless of hearing the song or not.

there was one scene where Agatha's son sang the song publicly.

edit:: the people that learned about the song could be considered like a tree; and each telling be considered like a new branch. not entirely sure, but possibly only some "branches" being part of an Agatha Harkness coven.