+1
Yes, at present it is really more a series of staggered skirmishes as troop units are piecemeal added to the mix, have to move to the conflict zone and engage.
It also means any numerical advantage you may have is lost, as it only seems to count at the back end, i.e. you can never 'overwhelm' or 'overrun' an enemy line with shear numbers (which should be possible when you outnumber them 3 or 4:1). And you (the player/army marshal) also get no say in what troops are selected when for battle - I have battles where my elite troops (e.g. Vlandian Banner Knights were not deployed AT ALL during the conflict, so their shock troop value is lost utterly).
Perhaps they should program it so that a 'representative' army size is created for the battle (given that quality of troops seem to little to no impact on outcomes, at least in my experience through numerous campaigns and wars) - so if your army is 1000, and their army is 800, then only spawn a 500 v 400 scenario and let the losers be captured (they will be anyway)