Originally Posted by
Bench333
Your opinion is quite inconsistent with the numbers shown on WoWProgress.
There are 12370 guilds who have killed Mythic Kargath. That's around 250,000 players who seem to have adjusted to the new format if you assume all of those guilds have no more than 20 players. In reality, most 20-man guilds rotate a few players, so that number is closer to 280,000.
On the other hand, by the end of Tier 14 in MoP, 16983 guilds killed Heroic Stone Guard. The split between 10 and 25-man guilds was no more than 2:1. The number of players who killed it while current was about the same - i.e. somewhere around 250,000-280,000 players.
In conclusion, the Mythic format, and the levels of participation are looking pretty solid so far. The switch seems to have been far smoother than anyone had predicted 12 months ago - probably because guilds had a whole year of SoO in which to adapt, so most MoP guilds with Mythic aspirations were already fully established by the time Highmaul released.
There will of course always be a very small minority who couldn't cope with the switch, and there's always a natural churn of players and guilds who disband/reform at the end of an expansion for their own reasons. The only thing stopping players converting to the new 20-man format is their own willingness to accept change.