The fact that there are workarounds and late game (multiple Gateways? Very late game...) solutions doesn't change the fact that micro-managing corvette fleets as it stands is an awful piece of design and UX.
Piracy doesn't make me think "a challenging problem to solve so that I can efficiently benefit from trade". It's a negative experience until you can deal with macro solutions to it.
How much micromanagement you have to deal with depends a lot on galaxy settings. Most of the time I only need two or three patrol squadrons, and once they have their routes I never have to touch them.