About 1 Sinroth, the popular opinion of players criticizing the game seems to be the engine, but if you play RIFT, wich uses the exact same engine, there is none of the issues.
My personal view is that in the effort to try and finish the game they hired too many fresh out of college student and the code ended up pretty unstable. I do not think the problem is the engine at all, though i certainly wouldnt mind a revamp of the graphics engine if it meant better graphics without them beeing heavier on the machine (something like TERA, but that can handle great numbers of players).
Really the point is: Dont believe what some random guys are saying about technical stuff. They really have no clue most of the time.
Also in that meeting with the fans, Dallas said they are improving the engine, wich is quite heavy and are hitting the main pillars one by one in priority order. The biggest one will be hit by the Illum patch, wich should already be quite visible in the game's performance. Lets hope that really happens. Most of the complaints about the engine would disappear after that.