Heroic Aggramar fell surprisingly quickly.
We spent over an hour trying to get our second kill on Heroic Coven. We finally got them down and reached Aggramar with about 50 minutes left in the raid. I think we resigned ourselves to going over the basic strategy and then pulling it a few times to see the fight.
Instead we killed Aggramar in five pulls.
I think that part of it was that we use a lot of assigned CC on Coven, so it was pretty easy to do the same thing on Aggramar. Then the rest of the fight is straightforward.
I think our guild's major weaknesses are movement and spacing. If a fight doesn't require precise movement and positioning, we're decent enough. I'm not really sure how we can get better at movement and spacing. From previous guilds, it's not something which is really discussed, but more something which is done naturally.
In particular, I sometimes think that many players have a "home" position in a given fight. That's where they stand, and where they return to after a given mechanic ends. I feel that there are several players in our raid who don't do this naturally. They don't go back to a standard position, instead moving to new positions, often based on the position of different mechanics, all the time. It's not like this is wrong, exactly, but it does make their movement unpredictable. This ends up hurting us in fights where predictable movement is more useful.