To be fair dude, we really should wait for details of how they go about it. popsiciedeath made a pretty good post on how they could handle it. You're just assuming it will be that way.. Was VG even that way? I didn't raid in VG..
Vanguard was full of compromises that ended up not necessary due to the population, but were a good start. You had 'open' dungeons, that had multiple versions. You had overland, contested raid content that was on lockout timers so if your guild killed it, they couldn't for a week, giving other people the chance to compete for it. So, there was always competition, just not to the point you could really, severely, absolutely cock block another guild if you were assholes. There was no reason to be an asshole, and yeah the population was better than most because it was so small, but you'd literally have guilds letting other guilds 'try' a raid target before they engaged the same target that was farm status for them. I think a lot of it was a smaller population, but also the cooperative competition sort of feeling. You didn't absolutely HATE the other guilds like you did in early EQ, who when they got to a target before you pretty much ruined your entire day, and sometimes your entire week. Or where you'd have a schedule, and some guild would say fuck it and go rogue and completely ruin and piss off everyone on the schedule.
When you didn't get to a mob in Vanguard it was like 'that sucks, but that's okay.' Whereas in EQ a lot of competing guilds had a seething hatred for each other (at least in my experience) to the point if you saw a guild massing for a raid or something popped, you'd rush to it even knowing you didn't have the numbers just to get there first and cockblock them.
And it worked well for the dick swingers in Vanguard too, because when the best raiding guild let you have a target, you knew they were better and letting you. Generosity was a part of epeening? I dunno, it was weird due to lower populations, but Pantheon will probably have lower pops too.
Other can probably go in more depth who raided more. There are plenty of ways to compromise. My problem is current games being design don't compromise. Compromise is bad. It's just all the way swung over to everyone gets everything at all times, which I don't like.
Cooperative competition. New buzz word?