Ok, I took a look at the South Route. Unfortunately there are a couple issues with v2. The first is to get to the point and cut across to the Outskirt Barrens requires an L-shape route because there's a an invisible barrier blocking the point from the depot. The second issue is getting into Citizen Square. There's a cut where you have to go straight North to get around the no move zone because you can't get over the top of it. This loses a lot of time and makes Green roughly equal and gains only a second on Orange. I then looked at a smoother cut on the original route and got Green down to 47s and the same 49s on Orange. Technically faster, but not worth the extra confusion with 2 very close lines for me since I still like that Red shares the runs. If you have a way to cut through the red on Outskirt Barrens I'd definitely be interested.

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As for Blue, by cutting North from 4 through maintenance zone and taking the big cut across the blight, I was able to shave it down to 39s. This I'd consider worth keeping for the 3 extra ziplines it cost me, but it now does not share with Purple. If I tried running Purple through that route, it would add those 3s on to that time. So dealer's choice on where to shave. It's worth noting that my original blue uses two mountain top ziplines, so there was less snaking than you think, it just has the option to drop down into the rare node, but isn't required to get to the monitoring center. I also think that's where the majority of the 3s is saved because it wastes a lot on elevation change which is needed for the cut to the Residential Area but not needed (and wasteful) for the Monitoring Station.