The new context API can probably help with that. Pass an object through context that contains the reducer state of a root level component (or a getState() or whatever), plus a dispatch function. Blam, Redux-equivalent without a separate library.
Ah, that's great that it's finally settled. RR is on v15 in terms of what it has to support though, so no dice; main focus at the minute seems to be on dropping v15 support and migrating to v16, which cleans up some of the code (particularly w/r/t the async side), but that has to happen before they bind to the new API, so going to be a while.