Cyanlabs find these new versions on Ford servers weeks to months before official release. In many cases though, there is a bug in them and they never get officially released, as seems to be the case with 23088. For most, waiting is the best option. Especially if on 22251 with full rwdata memory, you may not be able to do a standard USB or download update anyways. Maybe Ford dealers can update the Sync with FDRS that does not care if rwdata is full.
In any case, I updated 22200 to 23188 just now, about 15 minutes doing the app package only. Will be keeping an eye on rwdata to make sure it doesn't fill up.