In 2016, Michael Barbour completed research on a refinement of the iNACOL standards for online courses. His work on a rubric that is based on these standards was intended to provide a clearer path to course developers in online spaces.
While the iNACOL standards provide a wonderful touch point for this sort of development, they were perhaps somewhat vague in some strands, and the rubric Barbour has developed provides a greater degree of clarity. This version of the model also simplifies the considerations you may elect to have when reviewing an online course or resources you have placed online for your classroom.
If you're looking for a framework built around the current available theory, this is the place to start. Oh, and you may also like to view a copy with the theoretical underpinnings of each section of the rubric included.