The Ryan plan wasn't perfect, but it was a plan- with details.
Well, no, it wasn't. It actually was just a white paper with a lot of hand-waving (e.g. assumptions that the tax code would be tweaked in some way--without providing any details that could actually be analyzed by JCT--to get the revenue levels Ryan stipulated). He laid out broad concepts, there was no legislative language or policy detail to fill in the substance (read the actual budget resolution these guys voted for on April 15). His problem is that the high-level concepts he wrote down weren't very impressive.
The Dem plan is what?
Plan for what? Medicare? They've already taken the hard steps of laying down their foundation (with actual detail and legislative language--in fact, as I recall, the common complaint was that their proposals took up too many pages) and passing it into law. It essentially revolves around payment reform, delivery system innovations, data-driven quality improvement, and focusing on a transition toward a value-based health system. All proposals from here on will build on that framework, which is already U.S. law, not just a high-level concept paper whipped up by interns who like making graphs in Excel.