The lack of communication on the change is the issue. How aren't you getting that?
It should certainly be the issue, though there are folks whingeing about the nerf itself which are muddying the waters of what the thread is about. Certainly the fact that frantic luxury trading did not move supply or demand numbers shows that something was not working properly, though whether that was a bug or a poor design is another issue. Despite the trading simulator they proudly told us about, FD have struggled to get a working economy up and running. But then such things are non trivial to get working in a manner that 'makes sense' and that still provides a means to money for us.
If there has been a nerf (I don't grind at trading so I don't know), then there should certainly have been communication. Interestingly, there was a server-side patch yesterday (
https://forums.frontier.co.uk/showthread.php?t=108735), with a thread started by Michael, and it mentioned no such thing. Which leads me to several potential conclusions:
1) there was no nerf
2) FDs left hand and right hand do not talk to each other, so Michael did not know about the nerf
3) FD do not want to tell us about the nerf
4) The nerf got in by accident, so nobody was expecting it
5) Probably some others ...
Time will tell which is true, I guess.