Thanks everyone for the responses. There are many opinions and I appreciate all the time and effort. I shoot landscape and very slow landscape. What I mean by that is that every shot is takes time to set up and I will generally use filters to get the shots that I want to get. I usually only shoot sunrises and sunsets or during bad weather when it is very interesting outside. The 5Dc hasn't failed me so far. What I did not mention is that I also have a 7D body which essentially sits unused most of the time in my camera bag. I never liked its output. The same pictures useing the same lenses always looked softer and not as interesting as the output from the 5Dc. It could be just my subconscious telling me that I like the 5Dc better, but that does not change the fact that I am interested in buying a new body. It seems to me that the majority of opinions is to not upgrade since I won't realize the advantages of the new sensors. Resolution for the sake of printing is not important since I use apps to res up the images that I print on 10'x6' posters regardless. Dynamic range is also something that I control right now with software since all of my landscapes have some level of photoshop editing in them.
I guess as it stands right now, I haven't heard a single compelling reason to upgrade other than to have the latest and greatest version of the camera.
Thanks again for all the comments and opinions!