In terms of addressing your overall concerns. Despite our best efforts and the hard work of the QA department and developers, sometimes bugs will fall through. In addition to that there are also gameplay tweaks and additions that people would like to see. But every single patch and update brings with it a host of fixes and tweaks to the current game.
The issue is not that bugs may slip through, but that lots of them have been with us through multiple major updates. And these are mixed with some intentional changes (sometimes undocumented or only briefly and cryptically mentioned in the change log) that are just outright baffling. Just to give you an idea what kind of things I am talking about:
- NPCs coming at full speed when they scan you (Why is this not top priority? It's devastating when multiple ships do this at the same time, potentially outright killing you instantly.)
- NPCs doing things entirely impossible for players. From clairvoyance ("You're hard to find" - yeah, that's why there are multiple NPCs appearing right at my location all the time), impossible reflexes (interdictions beginning the very instant you arrive in a system, switching target to you the very instant you shoot them even though they are busy with someone else, etc), impossible interstellar chases (Eagle keeping pace with a range-optimized Asp Explorer... what?), infinite ammunition (hello railgun spamming NPCs, utterly annoying), to scans going through chaff and silent running (and even when already docked) (for comparison, when I use KWS on an NPC and begin the attack, they often chaff and the KWS scan pauses and even slowly losed progress, so I have to wait until it is complete before I can attack lest I spend the entire battle trying to get the KWS through during a dogfight).
- "Magical reputation armour" = wanted pirate NPC belonging to legal factions yet you lose reputation when you attack and they are not wanted by their own people (even an independent corporation operating in a Federal system should necessarily respect the law and look down upon any criminal in their ranks).
- The "new" bounty system that is no longer new but still has the bounties utterly fractured to the point where some people intentionally suicide just to clear the dozens of small bounties in systems they were just passing through. Seriously, pirate interdiction in a system where you are not going to dock is 100% pure annoyance because even if you kill them you won't get to bounty unless you go out of your way and fly potentially tens or hundreds of thousands of light-seconds to a local station just to collect 2000cr... How is this still a thing yet we have no system to remotely claim bounties (which should be very easy to implement indeed)?
- Supercruise and hyperspace mode transitions interrupting keyboard input (e.g. mouse headlook activated by "hold CTRL" is interrupted when the transition beings AND when it ends - please note this issue is not headlook related, it affects all things, my significant other is used to throttling down when hyperspace jumping by holding S - which is interrupted and the game afterwards does not recognize that the still is still being held - *poof* full speed into a star). This particular issue is rarely talked about probably because everyone has a different method for throttling down during or at the end of a jump (physical HOTAS is immune, instant 0% throttle key is immune, not everyone activates headlook in the same way etc), but it is very annoying when it's being ignored for several major updates.
- Planetary ring quality degrading further and further with each major update.
- Also other graphics quality issues that should absolutely not exist in the year 2015 or 2016, from utterly horrible antialiasing to
starkly visible colour bands as if the game could only render 256 colours.