When using the in-game voice in a party, and using Push-to-talk, we figured there was a delay that couldn’t be changed. If I hit the PTT, I want to be able to start speaking immediately and that is not the case.
That being said, the quality of the in-game voice was quite good.
I’m always amazed when people use the in game Blizzard voice chat and not anything else.
It was mostly just to test the feature, but it ended up being so good we used it for the whole night. When I logged off for the night I did so before saying goodbye because I forgot we weren’t in discord.
I just had to remember to hold PTT a bit before speaking.
Its also worth noting that you can get in a clan-wide voice channel. Haven’t tested that though.