I am a end game raider.
In a nut shell, this is what frustrates raiders;
We first killed Najentus, 10/29/07. We have killed him every week since (28 times). He has NEVER dropped Pearl Inlaid Boots for our guild.
I would compare our guild's raid level to that of the top 10% of Arena teams in WoW. Every single one of those PvP'ers have their Vindicator boots, and probably had them within 3 weeks of S3 release.
Another great example for us, T6 tokens. Every single week in BT we see 4-6 tokens for mage/druid/rogue. Meanwhile we see maybe 3 paladin/priest/warlock tokens every week.
Again those PvP'ers maybe spent a month after S3 released to have Venegful Chest, meanwhile due to a for shit RNG and DKP, any given raider can spend 3+ months waiting to get T6 chest.
There really are some simple solutions Blizzard could implement to "level the field".
1. Eliminate the 3 token system on tier gear. Make it ONE token, usuable by any class. Then guilds like ours won't have 4+ pieces of T6 go to the DE Gods every single week.
2. For 25 man raid content. Add a new badge to every instance end boss, for example "Illidan's Badge of Conquest". Have each end boss drop 2 of these badges. Stick a vendor in the instance, who will exchange the badge for any item that drops in that instance except legendaries.
Those alone will help smooth out the RNG nature of raid bosses. 28 weeks and counting to see boots from Najentus is stupid. Having to DE 4+ pieces of T6 each week when other classes still need it, again is stupid.
That is what created the term "welfare epics". It is also why its still tossed around today.