With this we finish off Call of Juarez: Gunslinger. The ghosts in the final chapter are a very strange addition, really pushing Silas over the edge into madness. He seems to have gotten better by the time of the framing narrative but who knows what would push him back over.
I had a great time with Gunslinger and really wish there was more information available on how and why it was made. I definitely think it was stronger for its framing narrative and its willingness to strip things back and present a mechanically satisfying short western themed shooter.
As a thought experiment if they had gone for a more standard approach I think this is roughly the structure I would predict:
1. Riding with Silas's brothers, maybe dealing with some kind of ambush. (NB Need horse riding or justification for no horses)
Finish with reaching a town, cue cut scene with gambling and wild bunch, end with hanging
2. Silas trekking back to town and taking off after his brothers killers
At this point the exact ordering would be a bit trickier, but definitely you would mix in going after the wild bunch with having various regular bounty hunting style of levels.
Not sure you could pull of having a barkeep Bob with this set up, you would need to justify a big action scene like in the second last level and Bob as the barkeep loses a lot of impact without the framing narrative. So maybe you actually have Bob be in that final graveyard fight, perhaps finish with a deliberate double kill so Silas dies fulfilling his revenge.