Upgrading warfare was a good idea, but the system is absurdly complicated, and the manual makes things worse because it is so badly written.
Help files, in general, need to be reviewed and updated. They just imported stuff from LEGENDS and lots of it is not really in use in FA. (Princes? Ministries?) There is even a MYHEADTUTOR file for my guild written by some Legends person who has never existed as a characterin FA.
The changes in locks are a good idea, too, but again - confusing and complicated. And it is really dumb, as others noted, that a baron can't replace a lock.