Another feature they should really add is a “Spec Guide” like they have “Dungeon Guides”.
Imagine being in the starting room and pressing J and up pops a guide that explains the opponents specs … like if you are against a fire mage it will have a brief description of their stregths/weaknesses/win conditions as well as their core abilities like combustion/polymorph/iceblock. And maybe a couple tips for how to beat them.
This would be HUGE for new and intermediate PvPers!
Likewise adding in game guides to the most common 3s comps would be incredible. If you are facing the walking dead, they can outline their primary strategy/win condition as well as how to stop it. (If anyone who works at blizzard actually knows this)