Wow some of these are really odd. I've experienced a cople, but the resetting of plugins (touchwood) seems to have been fixed. And it was fixed, when I got a new beefy computer. Perhaps there's a link? It would be an odd one, for sure. Memory perhaps memory leaks and plugins resetting?
The issue with Sonar not remember export settings or getting stuck...that one I have, but it's not a deal breaker, because this is one of those 1st world problems lol.
I don't use a lot of those other features like lens, as someone has mentioned this as a problem. But for me Sonar has been rock solid for months. And I've been pushing the system since I got a new computer last October. I can get 60 odd tracks, 10-15 busses and aux tracks with a slew of Wave's plugs...48khz and 64bitfp and 64bitfp audio files. Best decision ever, because my old computer just couldn't cut the mustard. I still think that a lot of the problems listed here are hardware related. I could be wrong.