[Mithalwen]

I am sure that Faramir would have been a fine addition to the fellowship but without the sundering of the fellowship, catalysed by Boromir's attempt to take the ring, the quest surely would have failed. It was a betrayal vital to the plot.

If Merry and Pippin had not roused the Ents and if Aragorn and Gandalf had not gone to Rohan, Saruman would have prevented Rohan from being able to help Gondor, Aragorn would not have been able to distract Sauron's attention with the Palantir or been in the right place to call on the Army of the Dead. Frodo would not have made it to Mount Doom without these interventions. Most crucially of all perhaps, the story would have been very different if Frodo had met Boromir in the woods of Ithilien.

However the fact that the dream came often to Faramir and only once to Boromir suggest fate prefered the younger brother.