That's a 95% improvement over their position at the time of Martin Luther, but there is just one more thing to go.
In the NT, righteousness of justification and righteousness of sanctification are presented as different and separate operations of God, the former by faith, apart from obedience (Romans 3:28),
and the latter by the obedience of faith (Romans 6:16, Romans 6:19) in the Christian life.
Biblically, the Greek word dikaiosis; i.e. justification, is simply
a sentence of acquittal from guilt by God as Judge,
a declaration, pronouncement of the sinner as righteous by faith,
a righteousness imputed (reckoned, credited, accounted) to him as it was to Abraham (Romans 4:1-11),
but the person at this point has no righteousness of sanctification which is imparted through obedience in the Holy Spirit (Romans 6:16, Romans 6:19).
And speaking of improvement, there is that purgatory thing.
Just as works added to faith means that God's salvation alone is insufficient,
so also, purgatory added to the cleansing, purifying blood of Jesus Christ means that Christ's blood alone is insufficient.
Not to mention purgatory is not presented in the NT.