I gather you are upset because it doesn't show exact details of which, and while I agree it could be improved, we all know what happens, people min/max, they won't take certain routes unless they are most profitable, and some are upset because they can't see with current system if route a or b is most profitable.
The whole economy system could use a bit of a retool, though not that much honestly, just the way players are given information, because the information itself is there..
Yup, I see what you mean.
Personally, I'd like to see side quests allowing you to improve your margins inside each major power, each PP faction and each minor faction.
Like ... You take part to a CG / solo mission chain and you gain a (temporary) % bonus over such or such product in a station / power / superpower zone of influence. This is just one suggestion out of many to give traders something to do to improve their game play besides the meaningless "Elite" trading rank FD trivialized to death.
But this is one idea (not even mine) out of MANY I read over the time. To be honest, I'd be willing to try any changes they could muster at this point. Time will tell what they have up their sleeve : I don't expect it to be perfect, but I surely hope it will bring some complexity to what we currently have.