Jesus was/is God, so He could Not sin, but could and did experinence temptations to sin in His Humanity. And Jesu did in our stead, and kept wholly the Law as God intended in order to live, and holding to penal substitionary atonement model does not make one an easy believer, ask the stauch reformers, cavinist, and Baptists who have held to it!
Not the Reformers. The traditional definition of Christ’s obedience is both active and passive obedience (the
obedientia active and
obedientia passive). This is not obeying the Ten Commandments in order that this be imputed to man. Instead the active obedience includes the life of Christ from his birth to his passion (especially Christ’s ministry where he acted sinlessly and in perfect obedience to the will of God). The passive obedience refers to Christ’s passion, which Jesus accepted passively and without resistance, again in submission to God’s will as he suffered the cross for the satisfaction of our sins. These two are not separated, but the distinctions are noted. Christ suffered the consequences of the Law and he fulfilled the requirements of perfect obedience to the Law throughout the course of his life and ministry. Upon this basis (Christ’s submission in obedience to God’s will, both actively and passively), believers are not only forgiven but they are regarded as righteous and heirs by virtue of their participation in the complete righteousness of Christ under the law of God.
Within Reformed Theology this topic has been debated, largely on exactly what is reckoned to the believer. To what extent is this attributed righteousness
obedientia active and to what extend is it
obedientia passive. Luther seems to have leaned towards passive obedience while Calvin seems to have leaned towards (if not specifically arrived at) active obedience. But even with Calvin (and it is debatable to what extent he moved from passive obedience) this was the active ministry of Christ (and obedience to God’s law) in the Son’s submission to the Father (what you are rejecting).
In other words, while your view is not traditionally the view of the Reformers or of Calvinists, I do understand how it could be viewed as a "hyper" or neo-Calvinistic view as it denies
obedientia passive all together and restricts
obedientia active to Christ's obedience to the Ten Commandments. On the other hand, your basis is not the faithful obedience of Christ to the Father but Jesus' obedience to the Ten Commandments, so I am not sure that it can even truly be considered a hyper view of Calvinism either.