What I'd really like to see is a guildhest or something with DPS checks, AOE dodging checks, aggro generation checks for tanks, healing checks for healers, where the game directly calls out who's falling down. Failing your part? Boss mechanic ensues, directly punishes the slacker, and the boss yells out some taunting RP that makes it clear what the problem is.
Because the kinds of players that reach 50 without figuring some of this stuff out are going to pay much more attention to direct, personal consequences and the game telling them something they need to improve than they are other players telling them that A leads to B and B leads to C and C leads to a wipe.