I'm not suggesting he is lying. I'm just not convinced his version of events is gospel either.
Exactly.
I don't know what exactly happened in the set, but frankly; it ain't my business either. I know that I would have also been unhappy about season 4 becoming just Seven Of Nine show, even though new character obviously required more episodes in the beginning. If I am not mistaken, I think Mulgrew has admitted that she did have a talk with the producers to give other characters more to do and they did that in season 5. And I think it was a very good turn of events. Season 5 >>>> Season 4.
No matter what has happened between Mulgrew and Ryan, at least neither of them are appearing some random geek radio interview and throwing shades at other members of the cast or the rest of the production staff. Or at Trek in general. Ryan told in Star Trek magazine that she has zero interest of returning to the role of Seven, but that is about as far as she has gone to let the public know what she thinks about her time on Voyager now.