WoW ingame voice chat volume very low

The Recent wow ingame voice chat feature is great to have but many people often experience problem of hearing others because the volume is too low. Let be sure that you can turn up the volume of the game sound, voice, and microphone in game. Plus you can turn up the windows/mac's sound volume and microphone. But the problem is that after all this had turned up many of us still find the ingame voice chat volume very low. Often enough, we have to switch to Vent to solve the problem because other party members can't hear 1 or 2 group members. Can Blizzard improve the voice chat microphone volume so it actually let you adjust it to a usable level please?

It is clear that if the volume on Vent, WoW game sound/music works well, but the ingame voice chat doesn't, then the only explaination is the new ingame voice chat not designed properly.