Yes, all sin was paid for in full.
If the church in Ephesus was done with their salvation as the OSAS group claim, what's the sense of admonishing them to REPENT and OBEY what they heard and received, and warning them that if they don't wake up He will be coming like a thief?
If what Jesus finished on the cross is "SALVATION", then He will no longer come a second time to bring salvation to those who are eagerly awaiting for Him, those who will be presented to Jesus as a pure virgin and to God, holy, unblemished and free from accusations.
... I promised you to one husband, to Christ, so that I might present you as a pure virgin to him. But I am afraid that just as Eve was DECEIVED by the serpent’s cunning, your minds may somehow be LED ASTRAY from your sincere and pure devotion to Christ.
...But now he has reconciled you by Christ’s physical body through death TO PRESENT YOU holy in his sight, without blemish and free from accusation—
Aren't you RUNNING AHEAD of everyone else? Or have you reached the GOAL apart from the Body of Christ of which He is the savior?
...For the husband is the head of the wife as Christ is the head of the church, his body, of which he is the Savior. Ephesians 5:23
...And this is love: that we walk in obedience to his commands. As you have heard from the beginning, his command is that you walk in love. ANYONE WHO RUNS AHEAD and does not continue in the teaching of Christ does not have God; whoever continues in the teaching has both the Father and the Son. 2 John 1:6,9
I'll stop here and maybe wait for your rejection or hopefully for a humble acceptance of the Word.
James 1:19-27. Thanks and God bless.