After even more research(2 hours with fl companion): There are no -that- outstanding import/export routes. Certainly nothing that arent in sirius. I mean, trade routes in Galia are decent but so are in rest of Houses. Also, traders, on their way to Galia have to avoid:
Mines
Bretonians (trading with enemy)
Kusari Exiles (same as above)
Junkers (Trading trough independant space)
Outcasts (Trading just around their door step)
Gallic Unlawfuls (with OP Galia tech)
Gallic Lawfuls (Which likes to confiscare whole cargo(Their RP actualy encourages this))
Stupidly OP NPCs
Even more stupidly OP weapon platforms every half a mile.
Thats quite a bit compared to House unlawfuls and indie pirates for your regular traders.
And for all that trouble we get... What..? 10% more profit..? Sometimes even that hardly and only with Ore.