Ahhhhh... Forget the tactical view - the old Debug Camera view is still the best. I turned this on last night by changing my preferences script and battles are now nicer to play - particularly given the changes to the LoS and the battle field radar.
Why oh why, this is not available from withing the UI after all of the requests made for it with Shogun 2?
For those not familiar, the debug camera is a view that is enabled by modifying your preferences script under the Rome 2 directory. It allows you to view the battle field from a much higher vantage point.