Yep, forgot about the issues the EPS unit causes with plows. There is a bit about it in an article here:
When referring to 2013 model years (but actually applies to 2012+)
Ram's Chris Borczon said that they now have electric power steering on the 1500 model.
Even though we have not allowed plows on 1500 models, we want to stress that we prohibit it again because the loads the electric power steering will put on the truck, combined with the snowplow, just wouldn't work, he said.