I have just had a quick skim and I recall now why I liked it.
There are a lot more modifiers to factor in but there is a single roll for when a unit shoots or engages in HTH.
Also, there can be guaranteed casualties if you plan properly.
Without labouring the point:
A model has a base chance to kill.
You look up the weapon type vs the armour type, this gives you the base chance.
You add the modifiers, this gives you the modified chance.
Then you multiply it by the number of attackers.
EG:
We have Dwarves with axes attacking troops with chainmail.
Base Chance: 16%
They are fighting gobbos +8%
They have Joseph Bugman in the unit (his Morale Factor) is let us say 2, +2%
That gives us +10% to the base making the final total 26%.
We have 6 dwarves in the front rank so we multiply this by 6, thus we have 156%.
For every 100% you kill 1 enemy model.
For any % left over you roll a d100, if you get under then kill another.
So we can see that the same troops with spears:
Base 14%
Same modifiers +10%
24% base, but spears can fight in up to 2 ranks.
So our 6 wide unit with multiple ranks can have 12 fighters, so that is 24*12 = 288%. 2 guaranteed dead with an 88% of a third.
I recall now why I liked my pikes who can fight in 3 ranks.
Same principal with shooters.
It is so much quicker than WFB.
Now the thing that sets it apart for me is the command.
Character models have a Command Factor and this CF is how many units they can command.
CF 3 seems about right for a decent general.
That means he can control up to 3 units.
He must be within 5cm of one of them and each unit must be within 5cm of another.
This forms a brigade.
You actually assign orders such as double move, advance, charge, evade, retire and so on.
Any unit with a commander will do the order. If a unit has no leader then dice rolls are needed.
Troops are graded A, B, or C.
Guard, Regular, Militia.
This has an effect not only on their combat chances, but how much movement is lost when changing formation an so on.
It also modifies morale tests and also what they do when they are not under control.
TLDR: Combat much quicker than WFB, Command and Control much more complex and thus seems to be a more tactical game.