The charge that Finney did not hold to "original sin" is interesting. I have been looking in the downloaded PDF I have of his Sys. Theo. and am still trying to sort out that 19th century terminology. I am currently reading
Theologians of the Baptist Tradition, ed. by Timothy George and David Dockery. This is an excellent book and I highly recommend it. It has everyone from Gill to Erickson.
In the chapter on Walter Thomas Conner, a Southern Baptist, he echoes what has been said of Finney about original sin: "Conner refused to accept either the Augustinian or the federal theories" (p. 209). But no one calls Conner a heretic! Original sin is originally a Calvinistic doctrine.... Calvinists seem to hate Finney categorically and sometimes without stated reason! Conner was called a "modified Calvinist" (p. 211), but late in life changed from "penal substitution" to "Christ as victor."
In the same book, none other than A. H. Strong was saved in a Finney revival meeting (141-142), so we have Finney to thank for Strong's tremendous
Systematic Theology!