As part of the new design for the upcoming Arena Season 7, Blizzard is planning to remove the ability for a player's 2v2 rating to count towards their eligibility for the current season's rewards. This means that unless you're playing in the 3v3 or 5v5 arena brackets, you won't qualify for any of the newest gear. As a class who's dominance has always been most prominent in the 2's bracket, I believe this change hurts the Rogue the most.
We're one of the worst classes in 5v5, and that's a trend that has continued since Season 1. Luckily, we do have viability in 3v3. When combined with a caster and a healer, Rogues provide the leverage it takes to give their teammates an opening to unload powerful spells into the target while stunned and their healer is Blinded. While our problems with low survivability are more evident when there are 2-3 DPS pounding on us, with intelligent cooldown usage and an aggressive playstyle, Rogues can conquer the 3's bracket.