2 Things, one solution is not enough.
1. Merge all 3 servers - Make it PVE. Then offer free xfers (one off) to APAC players to go back
2. Offer 1 off xfers to servers of choice
I agree with this.
I've literally levelled on planets where i was the only player on the planet from my own faction let alone had much chance of seeing players from the opposite faction on MDN. So open world pvp is by far a secondary concern for me now.
PVE super server with added rp channel (as others have suggested) sounds like the best option to me.