Lets look at the different debuffs/ccs...
Stun: stops ppl from moving, atking, casting, reduces Eva to 0, prevents use of items
Fear: same as above
KD: same as above
Sleep: same as above
Wormming: same as above
KU: same as above
Immobilize: stops ppl from moving, reduces Eva to 0
Silence: stops ppl from casting
slow: slightly stops ppl from moving doesnt really do much
p/gheal debuffs: stops heals from being as powerful they exist? oh, on niche, meme, or shit classes
block/parry/res/def debuffs: lowers defenses
Disarm: stops ppl from (effectively) atking, does NOT stop ppl from moving/running, does not stop ppl from casting, does NOT reduce eva to 0, does not reduce any defense.
Disarm is one of the few "its fine" things in PvP thats actually fine, it should be left alone.