Its an amazing huge zone that is completly unused.
My suggestion is to open it from winterspring/felwood/ashenvale sides *(all contested teritories).
Benefits of opening the zone would be huge for PvP since the population is already too high for one server.
It can be a place for mass PvP events and people who never explored can enjoy this amazing zone.
I would really like to hear some comments about this suggestion.
For all the `not blizzlike` kids. You can still explore(enter) hyjal by walljumping. I dont see how it can hurt to open it from one or two sides and leave it completly empty as is right now. I really cant think of any downside in opening this zone, considering the population. It would be a shame to leave this huge and amazing zone closed.