[Cadrid]

Eh, it depends upon how much of a boost the "bug" gives you. If you can XP-grind more easily with it, that's all fine and dandy. It's when you start solo'ing things you shouldn't be able to solo, or avoiding certain key abilities of bosses, or griefing other players that those "bugs", in my book, become "exploits".

Effortlessly kiting a mob up and down a ramp/ledge to kill it because it's stupid and has to take some long-ass round-about route to reach you is far different from, say, finding a way to avoid Vael's Burning Adernaline attack, even when both are a result of using in-game mechanics.