Hi there,
Thanks for the input! I agree with your insight - essentially all wire styles are fine right up to when they start crossing each other, at which point you can’t read the network at a glance anymore.
Funny enough, I’m actually experimenting with some changes along these lines. 
Curved wires are in alpha right now. As Hylk noted, not everyone likes the look of them, and they can get just as unruly if you let them. But on the whole, I quite like them and they are likely to make it to the final release. (as an option, of course)
The idea of wireless or portal devices has come up a few times before, and I’m positive towards the idea. It’s a little further out though, because it meshes well with a different set of features that will drop in the version after AP most likely.