Bt has access to everything in the current space Marines book, even librarians surprisingly. To get access to the gladius you jus lt can't take Crusader squads. That's it. BT characters are featured in the command and auxilary formations, Grimaldus got a SIGNIFICANT points drop and his servitors went from having a 6++ to having a feel no pain bubble. Emperor's champ retained what made him good about the old chapter tactics and still gains all benefits of the new chapter tactics. Taking the libraries conclave with separate chapter tactics and sticking them in Bt squads only makes them better because adamantium will and Crusader. Helbrecht still works like an ork war boss but with better saves. OUR DREADNOUGHTS NOW HAVE CHAPTER TACTICS, so angry space Marines wired into big hunks of metal with 4 attacks base.