It would be a shame to just eliminate the Dyna, but the number cruncher types tend to just look at sales figures and blow off the fact that not every motorcycle buyer wants a 900 plus pound touring bike.
IMHO, as I've stated many times before, they don't need to eliminate the Dyna, they need to redesign and update the model. They've been using the same frame since Moses roamed the wilderness, kind of like what they did for 30 years with the Touring line before 2009. People have changed in size and shape, the bikes have not. The same applies to the Softails btw. Different paint schemes and minor styling differences no longer work, it's time for a fresh and clean sheet of paper there as well.
I think about a lot of things in terms of the automotive business, and one thing you see in that world is that trucks and SUV's generate most of the profits but you don't see the manufacturers eliminating the small and medium sized cars with the small profit margins. There's a very good reason they don't, and Harley needs to understand that.
JMHO - Jerry