Wow there were daily quests in Cataclysm albeit not as bad as usual, almost kind of exactly what I said. Logic says hi. Plus, you could just run dungeons for rep, you didn't need to log on everyday for daily quest rep. Even if you were losing rep from not doing the dailies every day, you were still able to grind out the rep whenever as opposed to needing to log on every day. So good try, good try.
I just solo ran normals on my max level characters. Soloing Grim Batol with the drakes was easy enough that even my freshly max level Rogue could do it. My prot warrior was even easier.
I dunno what kind of personal, subjective experience you had with running dungeons for rep but I did it just fine. Not sure what you're trying to argue by saying "LFD was still new and you couldn't find groups!", was never my experience with it at all.
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I have literally never once done archeology, nor do I think the epics from it were ever mandatory. The 2h, I recall, was sort of BiS for a couple of speccs pre-raid, but hardly something you had to get for "early pushing".
I think you just got bored of WoW in general and blamed the burnout on Cataclysm. Outside of the most recent tier of raiding there was hardly anything to really do in the game at any stage of its life, and looking back on it I don't see how Cataclysm was very expressly different from that fact aside from the removal of gated raid progression from Vanilla/TBC.