If it's mostly indiscernible from baseline that's perfectly fine and allows for incremental improvement. Think infinitesimal changes in light of multiple dimensions. When you have separate development and stable versions there's always the risk of packing too many large changes and no one actually wanting to upgrade (given a choice) because the product is already good enough. Pro and con for both approaches but IMO, you need mostly small changes and occasional big steps when small ones can't get you there.