Two Servers?
I know Riot doesn't want to split the player community, but why does having two or more servers have to split anything? Everyone would have lower ping with more servers, and if you wanted to play with your friends on the other side of the nation, you should be able to. The only difference you would have if you queued with your friends across the nation is that it might take longer to find suitable opponents in that particular range of latency.
Moving the server to accommodate one group of players at the expense of others doesn't make any sense. Riot should use multiple servers and determine which one you play on by the best connection for everyone in your game.