To be fair, we’ve always had those abilities except for the self healing vial.
Kidney Shot, Evasion and Gouge used to be available to all specs. Same goes for Dismantle, Blind and Shiv (used to remove Enrage effects, Cata and onwards).
Poisons were available to any and every Rogue and we used to have Instant Poison along with Deadly and of course the old Wound and Cripple, which could be used in any combination.
Outlaw does benefit from Between the Eyes, being able to stun from a short distance instead of up close but you lose poisons.
A class favored for PvP… I remember playing dudu’s, which meant you had to manage your stuns carefully due to DR. Our (burst) damage output was negligible when compared to a dudu’s ability to do major bleeding damage, movement constrictions, insta range dot, insta tank form and self healing (obviously no DR on that). If you made a single mistake, the dudu would be healed to full and you’d be left with barely any CD’s, your stuns still on DR making them near useless and your damage output laughed at by a big furry bear.
What I’m trying to say is that I believe no single class is favored for PvP although some might be a bit more versatile than others. It’s all about what Blizz does to the abilities, not so much which abilities we have. Having a third stun is nice but if your damage output would fall behind, it’s useless. In my opinion the focus is too much on which class is in a better place, whilst it should be on what abilities do and how much damage they do.