I really liked how Speech was a viable option in most encounters in New Vegas.
Being able to reason with Legate Lanius instead of doing a final battle was pretty sweet.
I thought it was really lame actually. Ill just spoiler all this just in case. They talk about Lanius as though he is this brutal, godlike savage who has killed hundreds and hundreds of NCR soldiers and is loyal only to Caeser himself. And then you just talk him down by telling him that theyve already lost. Thats just anticlimactic and doesnt fit his previous characterization, who wouldve probably laughed at you and cut you down where you stand.
Going from Joshua Graham, an intelligent badass, to a lackwit murder machine wouldn't make much sense either. I mean, Caesar is fairly bright himself, so he wouldn't make some moron his number two. Just goes to show you that you can't believe all the anti-Legion propaganda! ---
Take me down from the ridge where the summer ends And watch the city spread out just like a jet's flame