Having spent 20 years in application development including a stint as the CTO of a small company, I appreciate the amount of effort that you guys have gone through to produce something quite good. Are there bugs? Of course. Are they annoying? At times, yes. But no one with any concept of application development and the challenges that come with producing something as complex as LOTRO should complain about game performance.
Having said this, however, there are ways to improve your internal processes to produce better quality results. BMC sells a solution called AppSight Problem Resolution System. CA Technologies sells Service Virtualization to allow you to heavily compress the SDLC while at the same time reducing the number of defects present. And, of course, Wily Introscope is an excellent APM solution that will probably predictive capabilities to allow you to be proactive in reducing production issues especially around application performance.
Send me an email to the address on my Turbine account if you want to chat about this at all.