In your belief system, salvation is reduced to a possibility, not an actuality. That's sad, so sad to see.
Here's what I mean. Two ppl who are both lost, both spiritually dead, hear the gospel, one is saved and the other isn't. In your belief system, the one who was saved was because they did something, and the other one didn't. Forget the fact that both are in the same spiritual state. Both are dead as in a spiritual corpse, but in your view, both were able to do something, and the one who chooses to do that something is the one saved. The reason why the one remained lost is because they didn't do something.
So, in your belief system, the cross put all ppl on equal footing, meaning if they do something, they will be saved. So, in your belief system, it was the cross + what they did that garnered their salvation for them. That's a false gospel, another gospel.
The cross + anything is not the gospel, but another gospel.