Win or Lose, you get a good amount of commendations from each Warzone you play.
Example: 5 medals, loss = 74 commendations
10 medals, win = 97 commendations
Valor Ranks are now for prestige titles only and everyone can played ranked wz's for ranked commendations.
The only barrier to PVP gear and mounts is the amount of participation you are willing to put into it.
This is a great change Bioware!
For me personally, I PVP for the gear/looks and then I go back to Hardcore/Nightmare operations.