The 'FFXI population is more mature than WoW's population' really has no grounds, unless someone can site a specific study reporting the age (and mental age) of the subscribers. However
, from playing both I can say I've run into much fewer people in FFXI than WoW that insist on spamming and can't seem to find the instruction manual for their Caps lock key. This is just personal experience and is completely biased, no denying that.
I'll have to agree with this. There really is no valid reason not to have it, but until we see the endgame content and find out if it'll even warrant enough coordination... there isn't really a valid arguement for having it.
As far as Voice chat is concerned, I think it is safe to assume that endgame content is going to require a fair amount of coordination. To say SE isn't going to make endgame content require coordination is simply ignorant. They would be taking a step backwards in that aspect if things were less coordinated.
Asside from endgame content, there are plenty of valid arguments for voice chat. First of all, simplicity. It's much easier to press a button and talk to someone, than to type out every word. From what I understand about FFXIV's battle system there will be no auto-attack, so not having to type out everything would be helpful. I don't know about you, but I play a MMORPG for the community, nothing quite puts the bow on top of that nice package like hearing the person you are talking to. And of course personal chat, is never diminished by hearing that persons voice.
Don't get me wrong, nothing slows someone down quite as well as typing every word out (some people need to be slowed down). There are places for voice chat and there are places for text chat.
Lastly, If you prefer to type, do it. But let the people that prefer to talk, do it. I think it's safe to say voice chat won;t be required for a majority of the game's content, so being excluded from a leveling party because you don't like to talk isn't going to happen.
Another option might be pre-recorded orders similar to FFXI <call>. "Incoming." or "Help me out!", these of course could be used in auto translate (and for obvious reasons only heard in party or linkshell chat), but that may be heavy on the system. Again this is a speculation forum so we won't know until the game is actually released, and these are just my opinions everyone is entitled to their own.