Switch to PvE realm of stick it out on PvP?

I am level 16, and leveling in the barrens is taking absolutely forever because of all the quest mobs being dead constantly. I can't level mining to save my life because all the nodes are gone. 10k is starting to really become a pain I think, lag included. Should I just cut my loses and restart on the PvE with its lower pop? I just don't want it to always be like this.