Since the best competition and #1 teams in the US are on the bastion, players should move here. On a further note, no #1 PVP server has ever NOT been on the west coast. So it would be the most reasonable, and convenient to move to the bastion.
One point to consider is that if people are going to get together on one server for ranked, choosing an East Coast server will really alienate all players from Asia-Pacific, including all of the Aussies, myself, etc. We are just barely getting by with our 150-250 ping. East coast servers easily adds another 100ms latency (I have a toon on POT5 and it sucks!).
No game can call itself a serious PVP game without at least one Korean gamer in it, amirite?