I wrote a somewhat related comment about this change here:
Read moreBasically our intention with the change was to make the chat (both text and voice) a little more intuitive and make both the text and voice work with the same logic. E.g. in voice activation mode you would still need to use the push-to-talk keys to use the local chat, and there was no indication which one you're using, and different keys were used to use the different modes of communication for text and voice.
We didn't actually anticipate that so many people actually liked the sort of "hybrid voice activation / pu...