Whimsy is even worse than Austen tea parties.
Yes I know we are all supposed to love whimsy but it's always irritated the crap out of me.
Janeway's holodeck choices very much suited her, she's quite traditional and even a little stuffy, as well as enjoying her history. If it was me I'd like my fantasies to be real fantasies of worlds that don't actually exist, I'd like to go to Barsoom or similar.
Now if you steampunk Austen, bronze borgifying her, it at least has the potential of surprise. Silurians in hoop skirts etc.. Whereas exacting historical recreations are celebrations of the mundane and there will never be anything fascinatingly new.