Alright I just completed the brotherhood of steel quest chain. The Institute and the Railroad are no more as are Deacon and X6-88. Regrettable that I couldn't get them to my way of thinking but oh well price of doing business (and I maxed their affinity before they died so I still have their perks). Now I've gone back to my settlement and have discovered that, while he is glad to still give me missions, Preston Garvey will not travel with me anymore. Is there anything I could have done beforehand to prevent this alienation? If not I probably should have gotten his perk first and then contented myself with that. Anybody know how to keep Preston Garvey a buddy after the Brotherhood of Steel questline is over? I'm willing to go back to prior saves (though i hope not to go back too many saves). And who else is alienated by my decision to wipe out the institute and Railroad? I know Curie (who I have max affinity with) and MacCready (who I am admired with) will still travel with me.
Any help would be vastly appreciated.