I know i am going to get a fair amount of blow back from fellow testers on this, but i think it is clearly the truth. All player testing in ID managed to do was cause unnecessary drama and give a perceived (and in some cases real) advantage to the testing guilds. The argument for having so many players test ID content was that it was supposed to reduce bugs and make for more polished content upon release. Did we actually see that?
Drak - Pets getting explody bubbles if parked in the back of the room.
Fire Mini - Despawned and never came back, then the wall that never went down, crazy agro range, adds despawning immediately.
Ituzial - useless enrage timer, as well the whole point was to force you to kite him in a circle, which no one does because the encounter is not actually designed to make you do so. Also his AoE damage was too low at release. (This was probably the most polished fight at release)
Conclave - Hard mode is easier than normal mode, and Packmaster P3 was actually impossible. Also, again, useless enrage timer. Also the combat start is really buggy and still has not been addressed.
Scryer - Do i need to go there? Not a single thing on this encounter has worked right yet, insane agro range, also it still has no enrage timer.
Rusila - Reflects on Dread Shot, useless enrage timer, half the mechanics not actually working reliably, no snipers.
And i am sure there are some bugs that i left out. When HK was released it was buggy, for sure, but the bugs made it more difficult. In ID the bugs have made things much easier, leading IMO to most of the hardcore raiding scene's ire. Had ID been released as bug free and polished as it was supposed to be, there would have been MUCH less QQ from the top guilds, and there would have actually been some sort of a progression race.
In the future Trion needs to figure out a different way of dealing with their raid testing. All ID's testing did was create drama, give people insight into encounters before they were released, and give us an instance with just as many bugs, or at least IMO way too many bugs to justify the problems it caused.