I can understand your dilemma (I think).
To re-roll and lose all that you have played for over the time you have been on the losing Alliance side.

All that time and effort gone with a click of a button.
Alternatively, just change to another realm so you can still revisit you alliance account.
Only you can decide on that.
Bite the bullet and go for it if you are not happy.
(It is only a game so they keep telling me).
We are not just about War and more war as you say I and others have spent many, many night just sitting chewing the odd Dolfs leg and watching the world slip by.
These times have been some of the best times I have had here.
Normaly starts with just a few sitting around a fire and before long a large party has formed from all races and classes taking part.
Sure you still get the lammers who stand in the middle and dance about, but there are ways to deal with them from total ignore too giveing them more RP stick then they can handel.
However the grass is not always greener on the other side and if you do re-roll and regret it ohhhh.

All I can say is that I am happier here after I spent my first few months on Argent Dawn I do not regret the move away.
Goldshire exists on all the servers from what i read.
Perhaps they should nuke all of them on every server.
Good Luck to you and what ever you decided to do.