I'm currently a subscriber to this game, and am an officer with a guild that is aiming to tackle the end-game operations (read: raids). So I'm pretty much stuck with this flying turd unless / until my guild moves on which may be very likely to happen soon. The biggest problem we have? Bugs. Tons upon tons of them. Some of them minor, others hilarious, but there are a few downright game-breaking.
Best example I can think of is: There's an operation called "Eternity Vault". Beautiful place overall, Balanced fairly well and we were able to run through it so far on both Story (Easy) Mode and Hard Mode. This particular raid is practically the poster child for our guild when we talk game-breaking bugs. The final boss of this operation: Soa.
Lemme give you a run down of how this is supposed to happen. Go in, shoot him till he puts a shield up. Everyone runs to the outer ring of this circular arena and the floor falls away. You have to platform (Yes, this is an MMO, why do you ask? Mario? Who's that?) your way down to the next level. Everyone takes damage with each fall and the platforms fall away if you aren't fast enough. Healers need to be alert and ready the whole way down for the group to survive.
Reach the second platform; same as the first with a few changes. "Mind traps" will take one player out of action until it is destroyed. Multiple can build up. Lightning balls will damage the whole raid until the person it is targeting runs into it to make it explode. Occasionally Soa will take one person and send them flying in the air smashing against walls. This also takes one person out of the raid but is time-based more than anything. After a while, shields up, raid out, and we all put on our red plumber hats again.
Reach the bottom, same thing as the floor above, except the boss is invincible until the tank pulls him under a floating pillar and let's it smash his shield away making him temporarily vulnerable.
Sounds mostly fine right? Only problem is... This boss has been bugged to hell ever since release. You can only beat this operation by sheer luck.
Sometimes Soa doesn't come down to level 2 or 3. You have to wipe the raid and re-enter.
Sometimes the platforms don't appear correctly. The raid will be wiped for you by way of a platform falling out from beneath you and you will have to re-enter.
Sometimes the tank is mind-trapped. Guild says this is an admitted bug, or was... More on that after, but for now, not a huge deal just have the off tank take over. What? The off tank is trapped immediately after? Probable wipe as well. Re-enter.
This is how it has been SINCE RELEASE DAY.
My guild was discussing this and the admitted tank-trapping bug came up. Apparently now recently, Bioware is saying this is how they meant it to happen. In other words, don't expect bug fixes for this operation *ever*. Between bugs and everyone getting burnt out, the guild is discussing moving to Blade and Soul when it arrives.