Blizzard has opened up PvE to PvP transfers. I think this is a decent idea. I leveled my first characters on a PvP server thinking that it would add something to the game. It didn’t for me.
I think the timing is key for this. At this point the majority of the players who are leveling are playing alts. A 70 who transfers over from a PvP server to gank lowbies is going to get owned. I hope that new servers have six months or so before server transfers are allowed.
If you want a long take on this, see Lume the Mad’s PvE to PvP Server Transfers an Overdue Policy Change.