Here is the deal with VOIP. Some of it may have been covered already. But here it is.

A lot of times (even in raids) you hear a lot of chatter that you really don't want to hear. I don't mean commands or directions. But there's always that one, two, or three people who feel like everyone wants to hear about their day, what they're thinking, problems with the spouse etc. No, I do not want to hear about that. If VOIP consisted only of raid leader directions and instruction, it would be better. Alas, in these games there are too many socially deficient types who do not know when to shut up.

In terms of more practical usage (within raids) it is grossly overrated. In most non-world first situations, the raid leader is often talking to an extent that they are over compensating for the failures of their raid group. Switch to here, don't stand in this, stun this or that. If you have the right people in the group who do their jobs, not a single thing has to be said or coordinated (not even resurrections). Basically, VOIP is a crutch that allows people to raid who really shouldn't. If you come to a fight prepared, pay attention to everything around you, you do not need instructions over VOIP, period. North American players are just so inundated with "if you're not on VOIP you're doing it wrong." Which only became a thing because so many players are terrible at games, and the talkative raid leader became a means for them to perform marginally at the content.

Personally, I have heard enough social deficient banter in all my years of playing to do without it. Really glad that I don't do savage, so I never have to use it in this game.