I haven't played with the 2.0 stuff, but I do have the original Underware on the underside of my desk.
I don't like the core concept of routing cables through what is essentially 3d printed trunking. It's a ton of printing, and a ton of faff to install. Instead I use their cable hooks at various points along a cable run. Much quicker and easier to manage after the fact.
This is probably the most useful underware thing I've printed thus far, for securely holding various PSU bricks: https://www.printables.com/model/1119354-double-clip-cable-t...
I've used the one-point connector for power supplies and a few of them on my docking station, and it's been really secure, but thanks for pointing out that one, I'll print a couple of them to have on hand.
I wonder if you could use the lattice work and do cable lacing on it instead.