I'll cautiously say that's an interesting idea, but I don't think it's a great one.
Currently weapon specializations already do 10% extra damage a level. 10% accuracy a level is way too much, 2% per level at most.
(2H weapons) Splash damage on normal attacks seems like it could be really overpowered. You'd have to adjust the chance for decapitation - 100% chance is overpowered and make some enemies (like bosses) immune to it.
(1H weapons) -1 AP for normal attacks is HUGE, and would be very overpowered. There's a reason why only daggers cost 2 AP. Retaliation seems like it might be powerful, and it sounds like it's steppng on the toes of Opportunist. Decreased cooldown is also really huge and too powerful, especially stacked with the decreased cooldown for Way of the Warrior.
