Reading between the lines of what she had said in various interviews, most notably that the first 5 years were fantastic, I suspect that VP was too professional to make her true feelings on Bobby's resurrection known. Any criticism would have been seen as an attack on execs and PD in particular. Therefore, when she left she never had any intention whatsoever of returning - alas her storyline & character were then totally destroyed by the writers.
She was absolutely right to leave when she did & I admire her for taking the decision and sticking with it.
No doubt she was right to leave when she did. But "too professional" is a matter of opinion -- as David Jacobs said a couple of years ago, she didn't have the best relationship with the DALLAS executives and that that shouldn't affect the way a character is written out on screen, but sometimes it does anyway.
i.e., Pam and her exit were swept under the rug because the brass didn't like Victoria.
This is a woman who was able to shut down the entire Lorimar studio circa 1986 when she was pissed off about something ("Victoria knows how to play the game," said a co-worker).
Whether those actions and behavior were warranted or not, we're not in a position to say. But the fawning idea that Victoria was some kind of shrinking violet -- and one who always tells the truth -- is downright silly. Even
she'
d think so... although she'd appreciate the support, while holding you in contempt simultaneously.