The ones mentioned in this thread.
1 ton trading
bounty hunting and combat bonds having different effect on the BGS depending on how the bounties/bonds are handed in and not based on the number of bounties/bonds handed in
system security killing spree being close to impossible to oppose
discovery data INF bombing
Yes some of those have been fixed, but all of them are the result of the BGS treating transactions differently.
It started off a lot simpler than it is now. Many of the changes that have been brought in are on foot of balancing, dealing with the unintended consequences of grinders and actual exploits like 1T trade. Essentially we are 3 years into BGS evolution from the simple system. We are at the other end of the process and you want to go back to the start ?
I also don't see huge problems with the current system other than perhaps that BH, Trade and bonds dont accurately reflect the totality of a cmdr's activity (I'm not 100% convinced that it should either!) . I have seen little in this thread to suggest that a major change would bring huge (or indeed any) benefits over the current system rather than a different set of issues!
I think at some point FDev will have to go back to the start as more and more specific fixes to problems add up and cause problems. Sometimes it's easier to rebuild something from scratch, or fixing a very fundamental problem, than to patch around the effects of that problem.
The sooner this is done, the less work it is.
Btw, by simpler system I didn't mean simplistic or reduced functionality. I meant an system with rules that aren't complicated and designed in a way that they can be applied to various situations without having to do a lot of special adjustments or exceptions.
You are right that it probably doesn't really affect the player just playing the game and constantly learning the news addition or change to the way the BGS works.
But redesigning or fixing fundamental aspects of the BGS could make it more accessible for players and easier to understand.