you are dependent on the punctuality and longevity of all players in your party, or raid.

If you have your healer and a tank, the three others come fairly quickly. because it doesn’t matter really which classes are invited.

If you are a tank or a healer you are the only one waiting, and doing /who’s for your counterpart, as when these two classes are found people come running. (this extra work contributes to the rareness of these classes)

People will not like to sit around and wait for the “critical classes” that bear most of the stress in WOW.

If you are a DPS class (most everyone is) you are most likely looking for a dependable tank and a dependable healer, the two rarest classes in the game. This is because these positions are too stressful for most people who have jobs, or other IRL things to deal with.

Healers and tanks are the most stressful positions in wow, and are rarely “fun” as people will expect you to do exactly what your supposed to, on time, and, have the right gear equipped. If you don’t the flak doesn’t stop coming.

I ran two different guilds for a total time of 1 year, both guilds were completing the first end game instance raids. I can attest that no matter what, this problem is always there, due to that pesky thing people call IRL.

the only thing we could do to avoid flakey players, is by recruiting massive amounts of players based on the time they are active, and even then there are times when nobody has logged in.

If the stress were evened out. If you weren’t so dependent on the two classes nobody likes to play, it’d work alot better.

It’s poor game design
the guilds can’t be run better, unless you quit your day job. A guild with a regular raiding schedule, and forums is pretty much the best you can do, aside from being online 24 hours a day.