What warhammer needs is skirmish rules in the game book expanded on.
What I feel is:
- Most units should have a skirmish option, especially if you take less than 15 of them.
- Skirmishers (as now) shouldn't take away rank bonusses.
- As now, skirmishers should be -1 to hit with missile fire.
- Skirmishers don't have problems with difficult terrain.
- A unit can reform into rank 'n' file or skirmish.
- A unit must be "skirmished" to assault walls.
- Ranked infantry units receive +2 CR per rank.
- As well as re-rolling break tests, a BSB should give the unit +1CR per 5 troops if the unit he's in is flanked.
Then some units fight better when "Skirmished" and some fight better (and generate a lot of CR) when ranked.