Perhaps we are not on the same page. When I initially posted this I expected a response like: Good idea, not sure why we haven't done that before, lets put it on the list of stuff we will probably never get to.
So here is the time line and let me know if I am incorrect.
The game starts, "Command console Activated" is heard.
You pick your com
Pick your location
You discuss what the plan is while the people with slow computers connect.
You are fairly sure of the plan and like your starting position
A couple people have still not logged in.
You realize the tv is on a stupid show/you really need to pick your nose/the cat is angry so you pet it/your ADD kicks in and you start counting ceiling tiles. You are not AFK just distracted for 5 seconds.
Then you hear the gear noise and the music starts and the game has begun
You are slightly caught off guard and you kick the cat/drop the remote/ignore the buger on your finger/lose count of the ceiling tiles.
On top of that, the guy who connected 5 seconds ago already started building mex's where you planed on, and you feel like your whole start is messed up.
The only indicator that everyone has logged in is the 3 2 1 countdown. And it happens in like 3 seconds. My only suggestion is to make a beep when the countdown starts and possibly have it start at 5 so you can possibly reposition if needed.
I don't think it is unreasonable to expect an audio cue when the countdown to play starts. I am pretty sure that someone who already has their brain wrapped around the code could do it in under 5 minutes.