I enjoyed this episode a lot. I don't see Ivy working for SY being an issue. Eliza hired her because she knows how much Ivy wants something different and that she is not content with her life as it is. I'm sure all the household stuff will be just fine. Women did work back then too and things still got done. Eliza isn't a child and will be fine.
I like the relationship between her and the new inspector. He doesn't look down on her, even though he didn't plan on working with her (or her working FOR him). And I think his daughter is a character and maybe he sees that Eliza is the same. ANd of course, there was that "look" between them.