A few rando thoughts...
We did FL with one tower up our first week, got one of the shards for the legendary mace. Haven't seen one since.
This week we tried for the achievement on Kalagarn where you kill both hands and the boss within 12 seconds. I don't know if this is "hard" mode but we failed, since we accidentally AOEd the left arm down while burning the right.
XT was a huge DPS check our first week, and we definitely had to cut some members and recruit some others. We were a sunwell guild pre-3.0, but during the easiness of wotlk a lot of our DPS became fat and lazy. Of course now they're nerfing everything, so wtf mate?
This week on council we did Big-Small-Medium instead of largest to smallest. Medium guy summons adds that target somebody and run to them and then blow up for 20k in a 30yard radius. Bit of a learning curve there. I suppose next week we will leave up Steelbreaker.
Hodir and freya were a joke, so I guess we'll find out what the hard modes are and go for them.
Fun instance so far, but I would prefer they not nerf bosses to pander to casuals.