I was about to reactivate my 5x accounts but decided to read the DB forums before I did.
I messaged an old buddy/guildie of mine that works for blizzard. He said he thinks it's going back in (/follow) he saw it on some designers white board.
There could be hope!
For me anyways, and I'm sure for you, the main reason I boxed was for PvP. If you can't PvP in BGs then what's the point. (There isn't one).