The alternate timeline where they didn't go to the island doesn't seem to me to be exactly 'what would have happened?' There are signs of meddling.
Desmon's temporary presence, for example. And Charlie's sense that he's 'supposed' to die.
My current, very loose, theory is that the splitting of timelines is perhaps something that Jacob sneakily arranged as a mechanism by which he could effect a resurrection of sorts. A kind of "backup reality" in which he was never killed by Ben. Of course, the island is sunken, and he may still be dead in that line...but there seemed to be something special in how Smokey fixed things for Ben to kill him. Some reason why it -had- to be done that way, or it wouldn't work.
The merging of the two lines to resolve back into an uninterrupted singular history would seem to be the direction of the plot, and ultimately the culmination of all the machinations of all the various entities throughout the show. I'm quite keen to see what is revealed in the process.
Desmon's temporary presence, for example. And Charlie's sense that he's 'supposed' to die.
My current, very loose, theory is that the splitting of timelines is perhaps something that Jacob sneakily arranged as a mechanism by which he could effect a resurrection of sorts. A kind of "backup reality" in which he was never killed by Ben. Of course, the island is sunken, and he may still be dead in that line...but there seemed to be something special in how Smokey fixed things for Ben to kill him. Some reason why it -had- to be done that way, or it wouldn't work.
The merging of the two lines to resolve back into an uninterrupted singular history would seem to be the direction of the plot, and ultimately the culmination of all the machinations of all the various entities throughout the show. I'm quite keen to see what is revealed in the process.