Clip shows are absolutely a way to create a less expensive show. Recaps can be used as filler but they're not the same thing at all, especially when you're talking about a recap that's less than a minute long.
Also, CBS All Access is not network TV. There's no requirement for episodes to be a certain length to meet broadcast standards. For example, HBO has been prefacing Game of Thrones with recaps from the beginning and their episodes run anywhere from 50 to 81 minutes long. So in the case of on-demand streaming services, recaps only add to the cost of an episode because, unlike clip shows, they're not replacing new content, they're adding to it.
Sure, you can rewatch the entire series before watching the next episode. OR you can simply watch the Cliffs Notes version for half a minute, reviewing only what you need to, and save some time.