Not a fan of the new (and now dead) version as it makes maneuver and altitude into a pointless exercise. It is much easier to get into position, and half the challenge of the game is trying to predict and engage/disengage with your opponent.
The big changes were they reduced the number of altitude bands, and increased fire arcs and speed.
Edit: How far are we in the campaign? Well, it if a pretty informal thing that is relatively open ended. We have had land, sea, and air battles. The campaign is more for narrative structure and deciding what to play next more than anything else. After a few years, I would say we are about half-way to a resolution? Just when it looks like the Imps will clinch, the Orks claw some wins back and ward off defeat!