I suppose it's his real world killer status VS. the stereotypical fictional monster he seems to have become in the popular imagination that's thrown me.
And that I don't find the figures particularly useful, kitchen knives may do for sex killers but there are only so many I can reasonably put in a faction that I intend to field against anything more lethal that unarmed ladies of the evening.
He's usually too well dressed to be just a thug with improvised weapons, and too shoddily armed and generally lacking in panache to be a criminal mastermind.
Dracula can be any stylish bloodsucker but Jack the Ripper is what he is. More than a couple in a group seems innately silly to me, maybe if reimagined as a gang of anarchists or something, but are kitchen knives really the best weapons they could find? I could do a weapons swap but how to explain the preference for doctors bags and top hats?
Fielding one of him is reasonable, two would seem odd, the amount implied by the number of figures available would seem inexplicable and ludicrous to me, YMMV.
Meanwhile what about all the other neglected villains of Victorian fiction? I can't think of a single Svengali figure even, (maybe I've missed it?) surely an influential enough character to deserve a miniature? The movie should supply more than enough visual reference and inspiration to artists, but the vague outline of a top hat wearing knife wielder with a medical bad seems uppermost in sculptors minds when they think Victorian villainy.