The audience seems to have written in complaining bitterly en masse about Frid's portrayal of coldly evil LeviaBarn, so I suspect the reaction to an evil Vicki, or even Moltke playing a well-written evil character, might have been equally unsophisticated.
It's interesting to note that the weeks of the introduction of the Daphne character in the 1840 flashback (not, be it noted, the character's original role as a ghost, and then somehow returned-to-life human, in 1970) present Daphne as a woman with a ruthless edge about her and a mission that certainly suggested her moral code was not in line with what the Standards and Practices office would have expected for a heroine. And Daphne was the closest they ever got to having a Vicki-like character return on the series.
G.