If you don't like them, kill em. And you can also kill many of them in fo3, just you gotta work with em. If they keep with multiple ways to end the game idea, then what's the problem? Me, I hate the ncr. So, I kill the ncr. I killed ncr in fo 2 also. Oh hi there mr. Ncr cop with gauss rifle, I want.
So in fonv I join bos, and I kill ncr and legion and house. Bos would then make me elder and I would plant my seed all over the mojave, and open recruiting making bos most powerfull thing in the universe, especialy in 20 year when my 40000 kids are grown up.
This is the beauty of fallout games except 3, which is to be expected as a first run fallout game. If you don't like someone, you kill them.
So, if you don't like them, avoid them until you have to kill them, or seek them out and KILL them. Hi my name is ranger andy have you seen my pals at ranger outpost waah waah? Yeah, I just did, they dead cuz I blasted em in the face cuz I wanted red scarf ranger outfit and hey wanna walk with me in front of dino? This, is how I deal with people I do not like in game(why was that not dialog option?).
So yeah, I hope there is bos in fo4. I also hope there is enclave, slavers, mutants, zombies, raiders, wastelanders, vault folk, and new factions, all who I can deal with in what manner I decide, either a warm hello or a shot to the face, but preferably groin. That is what I miss. Groin shots. Bring back eye and groin shots, but if I had to pick between the two, groin. Then you bos haters can have fun shooting bos members in the groin.
Btw, BoS has for sure been to Texas. It is fact, they would go to Texas. Lots of military bases and tech they would want to take in Texas. My first act of new elder of mojave bos would have been to visit the huge, mega powerful Texas branches of the brotherhood.