This is a must and would be such a workflow enhancement, to the end user.
I too feel your pain and I'm sure all of us do, when you are wanting to edit steps on the fourth page, but have to play the three previous, before you can get to it.
The same goes for chaining, since we can only have 16 patterns in a chain, it would be nice to be able to choose which page, from which pattern to include in a chain, for more variation, so we aren't stuck having to use all four pages tied to a pattern. Being able to separate and play a particular page only, would be beneficial to this use case, as well.