Depends what you mean by revenue sharing, all OW members pay into the OW alliance, maybe pro rata to revenue or profit but it's not as deep a relationship as the Atlantic Joint Business between BA AA IB EI AY.

Maybe OW should have an alliance standard that emeralds should get priority customer service on any airline, they already do at airports, but it will be hard to implement. You still have to call into the pleb line and declare you are emerald. Or they can implement call patching through, you call your own airline and they patch over to the concerned airlines elite call center. I can see the line just dropping. Or there are no available English agents. Speaking for IB and CX, the best agents only speak the local language.

As for booking fees, not going to be an alliance benefit and IMO I would not welcome it. Fare rules are fare rules.