JwI think trying to market to the "casual community" is basically useless because casual players as a whole will never be competitive-type players.
i think this is a non-issue because by marketing to the casual players only the ones who have an interest in 6s will try it out and if they dont like it then they wont keep playing it. ever since sigafoo stepped down it feels as though there has been a lot less of a forcing of the idea that NR 6s is the ideal way that 6s should be. new players will be playing in Newcomer and Amateur. if they are not "competitive-type players" they will never grow past that level, and thus wont have an impact on how the majority of players (IM, Main, Advanced, Invite) experience the game.
Marketing to casual players doesn't have to mean "omg come play 6s and build a sentry gun and teleporter on the enemy's 2nd point and also run full time banner soldier, a heavy and a sniper!" All marketing to casual players needs to be is "hey come try 6s! we have friendly experienced players who will help you learn how to play and hopefully you have fun!" I think current RGL administration understands this fact and will act appropriately.
At the end of the day, TF2 is supposed to be FUN. we play competitively for FUN. casual players play casually for FUN. and maybe casual players can play some low-level 6s for FUN as well. the more who play 6s (if even not necessarily to improve and try their absolute hardest), the better, imo.