That's not really true though. Combat logging basically renders a whole segment of the game null and void. PvP. I realise that PvP isn't to everybody's taste and there are some very vocal and vociferous opponents to PvP within this community but that doesn't mean it's not a valid play style and one that should be protected to the best of FD's ability.
It's becoming apparent (I believe) that FD don't have the ability to mitigate this exploit, but rather than openly admit that and potentially lose the current and future PvP playerbase they seem to have chosen to lie about it and pretend to be doing something while doing precisely nothing.
Seems to me that Hello Games, erm I mean Frontier Developments have some work to do in restoring the faith of the segment of the playerbase who aren't completely blind to their failings. The whole community put its faith in FD over this issue and were told time and again that it was being looked at and that in the meantime offenders would be dealt with. That faith has just been destroyed.
The problem with your logic is size of the PvP player base. I believe it is probably smaller than the combat logging player base. If you go with me for a second, FD are not going to care about combat logging, ignore reports etc.
PvP needs some TLC, a much bigger thing of which combat logging is a part. I just do not think the PvP base is big enough to warrant the resource required, so more generic content is focussed upon. If I am right about the size, not sure how the situation will improve, need a player base to justify resource, need fixes to get player base etc.
Simon