Assault frustration

[Blackcloud6]

Frankly in the situation you mentioned, I prefer to attack town or entrenched units with higher moral with nice multi stacks of adjacent units using direct fire before I ever use assault combat. Unless I have engineers mixed with infantry, APCs or tanks or I am desperate for time and just want to risk it on the last couple of turns.

This. They need to be softened up first which PG usually gives you enough time to do. 

It can be tricky if they have a lot of OBA to pound you with while you are out in the open. 

See my reply to Jay above.  The system is in favor of the defender with high morale as you are more likely to roll the recovery die role than the attacker is to roll a casualty die roll.  So I find that town/entrenchment assaults play out almost the same no matter what unless the attacker gets lucky snakes or boxers to kill the defenders.  It is very tedious to play these assaults out and I tend to avoid these scenario because they all end up playing the same in the last half of the game, rolling and rolling to resolve the assault.