Geneviève Bujold is too sedate, too stilted, and, even if there had been the effects that Kate had (I thought it was interesting that Kate's version had everything, while Bujold's did not, but there's probably an explanation
) she wasn't very convincing, especially
when that energy wave was about to hit Voyager
They didn't waste money on putting FX into the scenes with Bujold, since she was already canned.
I thought Bujold's face at the end of the scene with Tuvok (?) told it all. SHE wasn't happy with her read.
That scene with Tuvok in the ready room... I couldn't tell that Nicole Janeway
was tired. Bujold's performance played the same
whether just introducing Harry to his bridge station, or being listening to Tuvok report to her in the ready room.
Replay that scene with KATHRYN Janeway
... and you not only see Janeway is tired, you feel it
in her bones.