I know I'm probably really late to the party on this, but...so what?
Background first. I really only ran LFR a couple time during DS. I just didn't need stuff and I preferred to run with guildies and avoid all the asshattery I read about at the time. Fast forward to MoP. The first couple months, I wasn't really able to put much time into WoW. My work schedule was hectic and I was out of town quite a bit. Around early December, that cleared up a little and I was able to start focusing on getting a toon raid ready. I also decided to switch raiding mains from Druid tank to holy Pally. I really didn't/don't care much for the active mitigation style of Guardian tanking and being late to the show, I didn't really want the pressure of learning dungeons and heroics as a tank that was behind the curve. So, I switched to my pally, which has always been my primary alt (dating back to BC when I rolled my first holy pally alt). Got geared up relatively quickly through dungeons, rep stuff, and the help of a couple guildies. Then, I was able to hit LFR a couple times in the last few weeks, going for a few upgrades so I'll be better geared/prepared for raiding with my guild.
Okay, so here goes my thoughts on LFR:
1. LFR raids are a joke. The mechanics are so watered down, you basically have to be an idiot to fail. Or, perhaps even catatonic. Even though I've seen all the bosses in LFR, I don't think I'll be very prepared for real raiding because LFR just seems so simple that it isn't really teaching me anything. It's not a challenge. It's almost like steamrolling older content, it just takes longer to kill things because they have so much hp.
2. I don't really feel like I'm doing anything to contribute. Okay, I know I am, I can look at the meters and see that I'm contributing. I'm not topping healing meters, or anything, but I wouldn't really expect to at this point, since I'm only recently up over 470 iLvl. And, I don't really care if I top meters anyway. I just don't feel like what I'm doing matters. It seems like the raid will succeed regardless of what I do or don't do. Going back to point number 1, it just doesn't seem like a challenge.
Maybe part of this is because LFR is 25-man. I don't know. It's been a while since I really ran 25s. My guild has mostly been 10-man since Wrath. But, I just feel like 25-man LFR negates any individual contribution.
I know the LFR is really there as a bridge to the normal mode raids, but it just seems like loot pinata, without much challenge. Hell, even back in the day of Loot Reaver, you could screw it up and fail. I'm not trying to make this a rose-colored glasses, get off my lawn type thing here...LFR just seems too watered down. At least for me, maybe it's what most people want.
Again, I know I'm late to the party and this has probably all been said before. But, I thought I'd air my thoughts anyway. What the hell, the board's been pretty slow lately. :-)