level 65 raids shouldn't take 6 hours. If it does, you're doing something wrong.
Ost Dunhoth doesn't need locks because it's split into wings, Barad Guldur isn't a particularly long raid, especially as there's no longer a need to physically reach the keep outside.
There's chest locks, not raid locks. Scaling isn't amazing but it's better than how Moria was handled. It honestly sounds like you haven't even logged onto Anor and just pulling observations out of thin-air.
From what perspective are you speaking? I know that a T2 BG doesn't take 6 hours if you do things right, and have a group of experienced people. But let's say someone had to leave, or players just fail.. Shouldn't they be able to pick it up at a later time?
Same with Anvil T2, you can complete it fast, if things go smoothly, sometimes it doesn't. And in those cases, players should be able to pick up where they left, or people won't just dedicate their time doing it at all.
Regarding the loot, I don't agree.. none of the instances at t2c offer anything good lol. Most Moria gear is better. I have done SG/LT/STH in T2C and there is generally no good loot in there.
In Moria, at least for my Mini, BIS items were spread out through a lot of instances, and DN had some really cool loot. Yeah, I know OD is split up in three wings, and I know there is chest locks. At least, I think BG should have old style locks or same as in Anvil, and have better loot to make it worth running at T2.
I'm not pulling anything out of thin air, but please enlighten me, where are the good loot in the T2C/T1 instances?