Sorry, that it took so long; holidays 'n stuff.
Generally speaking if you're only raiding 2 days, you'll spend a lot more of your time reclearing (relatively speaking), especially if you're at least somewhat trying to min/max loot across your roster, even if you 1-shot everything.
More specifically: I'm not saying, that if we raided 3 days, that we'd magically jump up 1000 world rankings, just that we probably would have killed Azshara by now or were at least very close to a kill, if we had a 3rd raid day.
Our problems this tier were roster issues, pretty sizeable skill disparity within our roster and Orgozoa rekills.
We are one of the very few guilds, that only ever used 2 tanks (brw / bdk) and 4 healers on Orgozoa, which makes the fight a fkng nailbiter every time you have to kill her on farm, because every small mistake made by one of your tanks is going to wipe you. This issue got exaggerated by the roster issues & the skill disparity if for whatever reason, more than 2 key players couldn't make it to the raid. That's the reason, why we are where we are, while having a decent pullcount to first kill ratio.
Edit:
Don't get me wrong, I'm perfectly fine with not getting CE. (A kill is just unrealistic at this point, if you've got 2ish weeks left and you're still progressing p3 & havn't even seen p4)
I don't think mythic is too hard - If you want a participation trophy, go and get AotC.