Here is a list of players who have very little (if anything) to obtain from Karazhan and the current badge rewards.

Jyggle, Shabazz, Dreadwind, Alphatrion, Dethe, Stonehooves, Hakken, Baumol, Redstate, Sapience, Rosalinda, Cthulku, Kraygien (maybe?), Barbie,Baumol Rologan, Cayis, Iboch, Zuwani (maybe? I know he could use a few more items from the big 3 Kara bosses still)Bigmoma and Madox (maybe). That's about 19 players or so who are doing Karazhan mainly to help others and to gain badges to obtain their upgrades. These guys are waiting for Zul'Aman and beyond. These numbers do include alts, however. 

Players who I suspect need quite a bit yet:

Defiance
Becs
Goreshade
Ltmurder
Gnomebiter
Masema
Viviann (maybe)
Healzit
Evill
Ahcks (maybe)
Dreamir (Has yet to raid with us, but is keyed)
RD (Rarely raids with us)
Tubbyz (Has yet to raid with us, needs his Karazhan key even)

These players' characters could still use some Karazhan action along with the badge rewards and even heroic drops to reach Zul'Aman power (for some specs).

Players I didn't name probably hardly ever even raid with us. If you wern't mentioned, sorry! I may have overlooked you. The players I named are the most active in my mind who attend, log in and play. 

Seems like we've got a lot, but the consistency of log-ins is not high. Burn-out is evident as those guys who don't need Karazhan arn't logging in quite as much to do the place over and over.

Those of us who do play will have to continue to try to recruit good players. Even those of us who don't need instances can meet players by showing how efficient we can be in those instances, and maybe doing daily instance quests at the same time. We've got some folks who've recently leveled new 70's who'll likely be able to meet and recruit more as they equip their alts!

We'll also have to be careful, we've had a good deal of members use us as a content hopping guild. Meaning they play with us in Karazhan until they have gotten most of what they need, and then they leave. Their manners will give them away.