Rogues may be something approaching “fine” in arenas.
They are completely gamebreaking in Warmode. Getting killed in one stun rotation from a class with near-perfect invisibility that gets to pick and choose the terms of engagement is a recipe for pure trash world pvp. Why would people want to participate in a system that is entirely geared towards enabling bottom-feeding trash to low-risk, high-reward stealth gank? Warmode is broken, and rogues are the #1 reason why.
At least in Classic there is a reasonable amount of counterplay to rogues. In Shadowlands you basically need to hump around in a large group or leave the area if you play most classes.