Work on event-routing-backends and Ralph is progressing, but the xAPI implementations have a risk of diverging.
There are already some material differences (ex: the valuable anonymized actor ids in e-r-b) that break compatibility.
We have outstanding questions about the edX profile, with more likely to come up as development continues.
Should we set up a sub-group (or separate group or fixed set of meetings) to work on the problem of maintaining a consistent implementation of events as they get added and be our subject matter experts?