I've noticed this since about a month ago when I first started playing but just figured it was a server latency issue but I guess I will try reporting it as a possible bug. I also don't know if it's just me or if everyone is effected.

Currently in Mapleverse, when you attack a mob, normal attack, skill attack, either one, As soon as you tap the attack key/button, mobs react to either a damage hit or a fatal hit. But this is not how it's suppose to be from the old school game. Attacks should have a delay to them.

Mapleverse: Take normal attacking for example. When a warrior swings their weapon, a mob takes damage even before your character finishes swinging their weapon toward the mob. This happens with power strike as well.
I haven't tested it yet but I imagine the same thing happens with a Thief throwing stars, Bowman shooting arrows. If you are standing at max range away from a mob and throw a star as a Thief, and the mob takes damage before the star even leaves your characters hand, then that's what I am talking about here. Same with a bowman. If the mob takes damage before the arrow even leaves your bow. And for Mages, if a mob takes damage before bolt or magic claw even casts. Missing attack delays.

I've noticed with Soul Blade and Soul Driver (both Dawn Warrior skills). Mobs all the time get hit by soul blade or soul driver way before my character is finished casting the skill.

Soul Blade:

How it should be:
Player casts soul blade -> animation of character throwing soul blade -> soul blade flying towards mobs and mobs take damage.

How it currently is:
Player casts soul blade -> mobs taking damage and the animation of character throwing soul blade -> soul blade flying towards mobs after mobs have already took damage.

Soul Driver:

How it should be:
Player casts soul driver -> animation of character sending soul driver swords into the air -> soul driver raining down swords on mobs and mobs take damage. (mobs that are effected by soul drivers knock back are also held in place during the casting animation)

How it currently is:
Player casts soul driver -> mobs already being damaged by swords raining down on them while animation of character sending soul driver swords into the air. It's like the casting time is set to zero for all attacks and skills.

Without testing a bunch of other classes, I can't say for sure if other classes are effected or if it's just warrior.

Edit: Also noticed with the Brandish skill. When you attack with brandish, mobs take 2 lines of damage instantly. This is not the case in the old school game. There is suppose to be a delay between the 2 lines of attack to match your characters swinging of their weapon. Having a very slow weapon would result in a slow brandish attack animation and a greater delay between the 2 lines of damage.