My map
Whites are trade lane connections. Pinks are jumhole connections. Red crosses are intended chokepoints but they could be replaced with a system next door with the same idea. Blue circles are mining zones. As you can see, they are located right next to an intended chokepoint.
I thought Tau 31 could be a pretty good place for Gallics to mass before heading into Bretonia or Liberty. It could be turned into a forward operations base of some sort. A center away from their center. Not sure about its connection to Dublin though.
Omega 5 seems like a good place for Corsairs to have an access to, and where they could gather before raiding into the close-by two mining zones.
Both Corsairs and Outcasts can easily raid into each others homes now. And right in the middle there's the Sigma mining zone.
Not sure about Kusari. I'd say they need a mining zone connected to Tokyo.
To emphasize these routes, a lot of holes need to be removed to not allow too much bypassing. I'd also even go a lot more extreme with these routes, but I am sure even this much will not be liked.
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Having done this, all I could say in this matter is that the technicalities do not matter to me one bit. Yours, Antonio's, and anyone else's charts are perfect to me. Even an elementary kid could come up with things similar to these and as long as they were done with a simple purpose like this, it would help. I am happy with anything done in the right direction.
The real problem as it appears to me is to be able to sell even the core of this idea to the devs and members and get their willingness to work on this matter. And repeating this often, even if not with diagrams, I hope at least it will gather some attention.
I do not think any well planned suggestion will be implemented by the devs as it is, and they'll do their own thing with things such as trade and lore in mind, and the technicalities are something that should be discussed in the dev room with willing devs. The trouble is getting them to actually even consider liking any version of this suggestion. Hence why I suggest someone willing to work on this matter to step up and say, "hey, if you will be okay with a game like this, I am willing to work on it and spend my precious time on it."
Before that, I doubt anybody will come up with a magical jump hole chart that will make everyone go "Wow! Please implement this now!" Not that I want to discourage anyone who'd like to try. I'd be happy if that happened.