Pros:
Fast Money
Fast Route
More fellow traders
Simple
Cons:
High level NPC Wild pilots
high Level NPC Corsair pilots
Numerous pirates each day lurking about in Sig-13 and Honshu
Boring route
So leave it as it is, its balanced, it has its good things and bad things to it.
There are plenty trade runs out there that make more money, you just have to Discover