^ Right. Most people I know still announce their picks in Team Chat, and I can't tell whether they're doing it just because it's more convenient or because they genuinely don't know about the Teammate Orders feature. Given the number of times my team's picks have been an absolute clusterfuck in random tournaments I enter, I'm worried it's really the latter for most people.
Its always good to announce in chat simply so you can be more strategic for example when in chat i often outlay a plan for the whole team and not just my own picks so that we can all achieve good coverage of the map, just my opinion anyway..