I always got the impression Deanna was the Counselor for the senior staff and as most experienced Counselor took on special cases such as Barclay. She was the head of a team so commented on overall crew feelings based on feedback from other Counselors.
The bridge duties were an extension of her focus on senior staff and her abilities.
From 'The Loss'
Crusher:.. I want you to talk
talk to someone... there are several
several people on board with degrees in
in psychology...
Makes it sound like troi doesn't have a staff, or is crusher anticipating that she won't want to be treated by someone under her command?
Likewise when Guinan talks about applying to be ships Counselor.