What a ridiculous idea!!!
But seriously, it doesn't sound as easy as everyone makes it sound. Imagine that you have 25 people in your group... where are you going to stick that huge bar of players on the screen so that it isn't in the way?
More players means that you need to rethink how it works in the UI which could end up being a fair amount of work.
I'm not against it, I'm just not finding it too be impacting my game play at all, even when I am playing with 25 people.