Your idea is interesting, but I find it hard to imagine how it can be reconcilled, even if they argue hell as you describe because it seems to me that Christians would have to give up their notions of an all-knowing, all-powerful, and all-loving god if they are to believe in Hell at all. If god is all-knowing, then surely he knew from the beginning that the vast majority of humanity would not believe in him and end up suffering, justly or not. Thus, I find it extremely hard to imagine how an all-loving god could still go ahead with his plan. Also, if he is all-powerful, then there is no choice but to conclude he is willfully choosing to allow humans to make bad decisions with such horrible consequences and very limited information to make the decision, yet he is supposedly all-loving.
Some furthur observations is that if God is all-loving, surely the plight of the unbelievers would cause god at least some pain. So, will god spend all of eternity lamenting about the horrible fate of his creations, or will he be able to put it out of his mind? Will the Christians be made to forget, or could they go on in their bliss and put it out of their minds or become uncaring about the unbelievers. If god is all-powerful, then surely he has the ability to come up with a better solution to this problem.
Obviously like you suggested there are tonnes of other problems and I'm sure one could go much furthur than this to show how the belief
system Christians have surrounding hell is ridiculous, but any bit you can do to shake their beliefs is a step in the right direction in my opinion.