You can still slice state into separate reducers and action creators. I use a feature oriented directory structure, so that a given feature may have components/controls, action creators and/or reducers, but not necessarily all of the above.
It sounds a little convoluted, but in practice it's made it easier for developers coming in to discover/predict where things are.
Yep. I've settled on a "feature folder" approach myself. When we finally get around to revamping the Redux docs content, I plan on having a "Style Guide" page similar to the one in the Vue docs, which would offer opinionated suggestions with an indication of how important each one is. One of the items I definitely plan to include in there is a suggestion to use feature folders. I also want to reorganize our example apps based on that structure as well.
I too prefer feature folders. I wish it was the example most used...as it is we have a convention that has no reason other than "this how I first saw it done".