At what temperature do plan to SV? I find that SV'ing meats with high connective tissue content at low temperature (below (140°) yields medium rare product that is tender and taste very good but the but the connective/fat tissue is not completely rendered. A chuck roast smoked and SV'ed at 132° when sliced is tender and looks/taste like a fatty piece of prime rib. You might consider doing your final smoke at a higher temperature in order to better render the connective tissue. When I am going to consume frozen SV ribs, I thaw and sear them in a hot (450-500°) oven for about 30 minutes to complete the rendering, they turn out great.