I was thinking if Korean devs didn't like the specific evade chance then maybe making the Evade skill use Dex to Evasion rating like lvl7=100% Dex to Evasion. This will probably wont work in PvP situations but in PvE will be godly.
Look at my Dex 2057 if the Evasion skill was lets say 100% lvl7 Dex to Evasion then my original Evasion from 383 would be 2057+383=2440. PvE speaking that would be awesome kind of like Agi dhan, PvP speaking if the Ghost Arrow new buff was in effect lvl7 that is 50% drop in Accuracy the attacker would probably miss, probably.
Sorry for this part being an SS stupid ass forum doesn't let me post formulas for some reason and that is barely a formula.