I wonder if Alexandra Moltke's refusal to wear makeup – assuming that it occurred – had something to do with unusual skin sensitivity related to pregnancy problems.
I like Betsy Durkin's Victoria Winters. She brought energy to the role. Mine isn't a useful opinion, though, because I rarely have much use for Moltke's Victoria. But to continue anyway...Durkin was dressed in clothes designed for Moltke and she looked bad in them, but that could have been changed. She looked terrible with Jeff Clark, but Jeff Clark was not an indispensable character.
In one of the DVD interviews, I believe that Durkin said she was asked to return as Vicky, but she was doing something else at the time. I assume that that was when Carolyn Groves was hired briefly for the role. Of course I didn't like Groves's Victoria; it was too much like Moltke's.
As for Maggie, I figure that if she hadn't become the governess at Collinwood, she would have been central to some other plot or subplot, because Kathryn Leigh Scott is a go-getter.