I am actually super depressed by this news. Oh well.
it's not too late to file a bug report, and post on the classic beta forums, I would if I could
Even though it would be nice to be able to box BG's, the fact that they "fixed" follow in BG's but left it alone in world PvP gives me some hope that it was deliberate. Surely if follow was supposed to be removed in world PvP as well they would have made that change at the same time.
Great news about /follow working in wpvp, hopefully it makes it to full release.