how can it be wrong when it's taken directly from offi?
as far as i know, nothing changed in landrates with 2.0.
only some debuffs duration has been changed so far, and in the official patchnotes there was nothing mentioning a nerf in stun landrates: https://eu.4game.com/lineage2classic/play/saviors/classes/#skillschanges
if you have any info/proof from offi that can confirm what you just said, then feel free to share it, so at least we'll get the correct infos and we won't waste more time testing and reporting stuff thinking it's broken when eventually it's not( even thou i still have my doubts ).
that's because stun-canceling apparently is set around 30% chance, so you have pretty much 1 chance out of 3 of removing the stun effect if you use another damage skill right after stun lands, or if the same skill with stun effect deals damage and gets resisted.
i don't have a problem with the stun-canceling ratio anyway, even if i think it's a pretty dumb skill mechanic compared to what some other class has at his disposal( korean logic at it's finest ).
the problem is the land rate of some stun skills that has gone to complete shit lately, and nothing was mentioned about it until now.
if the landrate we have now it's supposed to be ok, then my bets go on CON being messed up once again.