I never felt a sexual side was part of Janeway. She’s Mom.
The Jeffen thing withstanding, since that’s not the real Janeway.
She became a "mom" later on, when the show began she was more sexual/flirty. Remember her silk nighties when they were talking with that Romulan in season 1 (I think it was season 1) and with Q?
About *Workforce*, I disagree. From what we saw, the put-upon personalities, were their own just without the strain of their ranks. Tom was the casual, laid back guy he know him to be, B'Elanna was herself too, just quieter. Seven was practically identical. Tuvok wasn't but, to me, that was because Tuvok needed harder brainwashing to let go of his memories. It makes sense to me that Janeway was also more casual and flirtier, just like she was on the phone with Mark in the pilot episode.