FENRISTYR,
Formations can help a little if neither you nor your opponent micros the units in a battle. Look closely at how the formations are set up, Box Formation for example, meat shield surrounding siege, cav to the outside wings, archers at the rear, there's function designed into that form.
If you set your units, each type to a separate military banner (group), then gross microing is much easier.
With everything being close to equal, the player who micros the best will come out on top of a battle, and formations will not help vs someone who micros well.
FAILURE is not an option, it comes bundled with the software.
The graduate with a science degree asks, "Why does it work ?"
The graduate with an engineering degree asks, "How does it work ?"
The graduate with an accounting degree asks, "How much will it cost ?"
The graduate with an arts degree asks, "Do you want fries with that ?"
Great minds discuss ideas; Average minds discuss events; Small minds discuss people.