Thing is, for a game like this, some bugs and exploits only come to light when it's been played by a great many people at once all racing for a higher rank.
Also, this many people stress tests the entire thing more than any set of employed testers ever could. That's why the servers went down for maintenance last week and when they came back online everything was running a hell of a lot smoother then it had since the update was released.
Some bugs were clearly ones that could have been caught beforehand, but FDev do seem to actually be working on them fast (see the expansions going to random Powers issue). As someone who remembers the bug of the PP 1.0 conflict zones having opposed NPCs that did NOTHING but sit there, an issue that took a MONTH to be resolved, I'm actually fairly okay with smaller bugs because it seems they're actively being tracked and squished right now!
PP 2.0 is good. Ascendancy is pretty solid, and as I said earlier, running pretty smoothly after last week's maintenance (bar the long FSD jumps at times).