There, that I can (mostly) agree to.
I guess the issue is that I am approaching the problem from another perspective. Yes, voice chat > text chat, no arguments from me.
Here is the way I am approaching the problem:
Ability to communicate increases the chance of group doing well.
Not everyone is willing to use voice chat (for various reasons, regardless of how valid these reasons are)
Some of the people not willing to use voice chat are willing to use text chat
Addition of text chat allows these people to communicate (at a level worse than voice chat), which is beneficial to the party as a whole.
Not going to argue that they could communicate better if they had voice chat, but I'd take text over no communication.
I guess what I am saying is that given 10 random people, I'd rather have 1 person with voice chat, 6 people with text chat and 3 silent people, than 2 people with voice chat and 8 silent people. Now ideally, you'd have 7+ people with voice chat but if ME3MP is anything to go by, this is not happening.
The issue is not limited to ME3MP. In MMOs raiding guilds more or less required people to have and use voice chat, however once you enter any sort of PuG, you'd end up with majority of people not using it. Unfortunately, this has been going on for a while, so this is not a new issue and it doesn't seem to be going away on it's own.
Only ways to go around lack of communication from people without voice chat is to either talk to them without any feedback, talk to them and get feedback in term of text, or don't group with them altogether. Most competitive people pick the latter choice, but those who are willing to PuG would probably prefer *some* feedback to none. I would rather take extra 5 minutes in a half hour dungeon to complete it successfully by communicating via text than fail it. Obviously it's a wasted 5 minutes if you have voice chat, but better than the alternative.