Lord Mhoram
Hero
The way I saw it - in 3.x you roll for saves, and the attack roll always took 10. In SWSA that is reversed, the defense takes 10, while the attack is rolled. Back in 3.0 they even described AC as taking 10 on the defense roll, and as an option you could roll your AC.
So mathematically speaking there is no difference in what happens, just letting the attacker roll all the attacks.
So mathematically speaking there is no difference in what happens, just letting the attacker roll all the attacks.