This flies in the face of what has been a blizzard mantra for the last few patches, bring the player not the class. So the new mythic encounters will have class specific elements. So even if you do manage to find 10 extra people that can make your raid times and have the know how to do hard modes and the willingness to not lose patience during the wipes you are going to have to make sure you have certain classes included to get this done.
I just don't think this takes into consideration the non-hardcore but serious 10 man adult guilds. Guilds like mine that are very large(we have 3 raid teams) but they all run on different days & times just due to scheduling conflicts. We have run our fair share of 25 man raids since BC/Wrath but ultimately run into the same problem it is too hard to coordinate 25 schedules long term. Coordinating 20 schedules will not be any easier.
Folks with kids have sports schedules/practices to contend with. Kids in college have class changes every semester. Ultimately the biggest obstacle to the large raids is just the logistics of it all. It's great you want to provide more challenging content but what good is all that money and time spent designing these encounters if less then 3% of your player base can actually enjoy it? Should you really be catering to guilds like Method and others you invite to Blizz Conn simply because they devour your content in a few weeks no matter how hard you design it? What about the other 90% of your raiding player base that have overwhelming chosen to raid in 10 man raids instead of the larger harder to manage raid sizes?
The last patch was released in September and 2.5 months into it my 10 man raid is just a few pulls away from killing Garrosh. We raid 6 hours a week. We are all looking forward to spending the rest of this patch until the next expansion working on hard modes. My guess is if this is the final decision about raiding then a lot of us will not be buying the expansion. There just won't be enough challenging end game content to justify spending the money and time leveling a character and clearing the new normal/heroic content knowing that we maybe have 2-3 months worth of raiding to look forward too.
Stormbeebes, this isn't meant to be personal as I realize you could be trying to speak for others, but just taking a quick glance at your toon and guild's achievements, it doesn't look like you guys really do heroics so this isn't going to affect you.
I'm not trying to be attacking, it is just that I'm seeing lots of people sweating these changes and how Blizz is getting rid of 10 mans, but the fact of the matter is they're only getting rid of 10 man HEROIC raiding, and only 10 man guilds that actually raid heroics have something the be worried about.
My guild is in a similar situation where we have multiple raid groups running different schedules, and I've talked with some of the other raid leaders about this change and it shocked me to hear that all of them were trying to figure out how to get to a 20 person roster, when really a group that has trouble getting through normals by the end of the tier should probably just treat this as good news, as they won't have to worry about being held hostage to unreliable raiders as much in the future.
Really, a normal mode raid group worrying about this change to heroics (mythics) is like dps worrying about tank talents. It's nice that they care, but it doesn't really affect them unless they decide to switch and do it themselves some day.
We raid 10m heroic and I'm sure there are many other heroic 10m guilds with limitations such as timzone, language, raid hours, etc. We may not be the majority but our concerns are very real and valid.