I can Persuade Old Jonas to tell me about Blaine, and Gorsky to give me access card to GMS compaund basement filled with burrowers with 0 Pesruasion (even don't need to talk to Quinton at SGS).
Not a bug but could be improved - Katherine still has her line "About Blaine guy" when I already found him, Sully in GMS talking about raider gang - and when I killed those that left near GMS ruins, I still can't tell him that raiders are gone, and it is safe here - would be nice to see a little more reativity.