the concepts need to be understood by each and every player as well. being in a situation where you teach the concepts over and over again can get repetitive and it feels like work. nobody wants to do work on their spare Friday nights
If a tiny fraction of the open+ players (let's say a tenth of them, roughly 50ish people) coached in mixes, you wouldn't have to do it to a point of where it gets dull. It'd just be a thing that you do when there's nothing to do on a Friday night, maybe once every couple of months.
I personally don't understand how an invite or high IM player could invest so much time into the game and not come around for an hour every couple of months to recruit new players. Seriously, if any one of the players from any esea lan stopped by and hung out with the noobies even if it was for a few minutes in the add-up lobby, that would be such a good experience to have. The thought that players that are the best-of-the-best are excited about new players joining the scene would be a serious moral booster, but instead the mixes often turn into a "let's see what mid open player the admins can scrounge up from their friends list", and that just kinda sucks.
idunno