I am not sure what you are getting at. Pres. Monson is still a prophet but he speaks like an American. It is the only way he knows how to be. Your idea does not make since to me. Prophets have to use the ideas and language of there times and people. How else would they communicate? Sure Alma was a prophet, but when he talks about Justice, he is talking to the people that see justice in a biblical since. We must not take things out of its context.
Thus God's justice in the Hebrew since is to restore one to its original state. It is more aligned to the idea of Charity not punitive punishment. Thus in the OT God's justice is to restore man before the fall. God's justice is only achieved when Man is restored to what he was. We know this to be godhood. Thus God's justice in covenant language is for us to be sealed in the eternities and inherit all that he has. This is the justice of God. Thus this is not done, unless he invokes mercy, which is the method that he exalts us. Thus as Alma says, Mercy cannot rob justice. Because it is by Mercy that justice is satisfied. This can fit in may ideas and even into Cleon's ideas, but one has to get away from the idea that justice satisfies a form of eternal law or punishment. (Cleon gets away for this to an extent.)
The reality is that the scriptures teach the atonement through metaphor. The scripture's do not sit down and give us the technicalities of the atonement. Even our church does not have a solid theology of the atonement. You can read the general conference talks for a year and see several atonement theories/ theologies taught.
I think this is a good thing because the atonement is something we experience more then understand. And any metaphor or idea on the atonement that gets one to experience Christ is a good thing. Thus Christ is more concerned in our ability to experience him the to intellectually understand and get it right as to how that process is done.
Like I said all atonement theories have problems. (mine included) But there are some good LDS theories out there like R Dennis Potter's ideas and Blake Ostler's. They do address some things that Cleon does not.