You've discovered pork steaks - they are great! They are a midwest (or possibly just a St Louis?) staple. All of the butcher shops and grocery stores sell butts pre-sliced into steaks. They are typically grilled low and slow or braised. Mom also used to sear them in her CI frying pan and then throw them in the oven to finish up on low heat.
I will say that i havent heard of anyone pre-smoking a butt and then slicing it into steaks... will definitely have to give this new innovation a try!