Sorry I snipped your post, its only for readability :|
I wasn't in some hardcore mythic raiding guild at my time on retail, but literally EVERYONE I have spoken to loved SoO. I personally did not like Garrosh being the main villain, but the mechanics of the raid are an improvement over anything WotLK had, that much is for sure. As for difficulty, I think its fine. I don't see it as a negative that Garrosh was down in 10 days. It means Blizzard learned from their mistake of releasing literally unkillable bosses (hello C'thun and M'uru at launch?). There's nothing fun in banging your heads against a table only to later find out that a boss (M'uru in this case) was mathematically impossible. Anyways, Garrosh hasn't been killed on Frostwolf yet (in hc) and I haven't actively raided on Frostwolf for quite a while anyways, so I don't know how "hard" he is. I can tell you though that the fight is far more fun than LK (this is, of course an opinion).
It's fine if you don't like the PvP on MoP. When Legion launched, a significant portion of the retail gladiator community came to private servers looking for servers to play. They had the choice of Blackrock, but they chose an MoP server (which is VERY poorly scripted, mind you) over Blackrock. I'll let you ponder why that would be the case. We had some of these gladiators come to FW too, but sadly they left because of the gear difference (no conquest cap at the time).
I think people care quite a lot more about Rated BGs than you think they do. You should check out arenajunkies to see just how much they are discussed. They are very similar to Cataclysm, but sadly our Cata realm is even more dead, so if anyone wants to do Rated BGs you only have 1 option on Warmane right now.
Re: talents, that's a strong no. No-one will change their talents, ever, after being BiS. Not for PvP, not for PvE. On MoP you change talents almost non-stop, with each boss fight having a different talent needed. In PvP, on my boomie, I two different playstyles, and that requires changing some key talents (incarnation vs FoN being one of them).
Re: dampening. Dampening can never reach 80%. Games are given as a draw before that. Furthermore, your idea that a DPS can stay afk until 50% dampening and stay alive are quite... revealing. How many arena games have you played in MoP? I assure you, no-one can survive being afk in any format with even 0% dampening. You just mentioned how easy it is to CC a healer. If you stand there while your healer is afk, you will die. This isn't some exaggeration, I'm being honest, you will die. You then follow that up by mentioning how the game takes no skill, but it requires "some scripted CC chain burst setup". I don't think you understand the amount of planning needed to:
a) Ensure you have all your necessary offensive cooldowns along with your partner
b) You have all your CC off cooldown
c) You have no DRs on your CC.