Having similar issue
Attempting to open the blueprint screen crashes the game.
Happens in Vanilla game, Vanilla sandbox game

I liked your idea, and ran with it.
I remade it to be extendable and easier to use. You can extend the number of buffers by copy/pasting the bottom part to overlap to as many as you need (down side being to make it work prevents the tracing of the 'V' and 'W' signals).

0eNrtnf1u2zgSwF ...

It seems to still work, and here is a vinilla blueprint

0eNrlWktv2zAM/iuFjpvdWbKTOMF2aIsB26GHdjl1KAInUVph8gOy3C0o8t8nxXk4iR+SnHTZ1kMLWyIt8SM/klJfwZhmOGEk4mDwCsgkjlIw+P4KUvIUBVS+4/MEgwF4IYxn4o0FoiCUL/IZ9hAsLECiKf4FBnBhaUh+LUgiLcnbgqSrJfm5IOktHi2AI044wfmmlw ...

I to like spaghetti modules, though usually in two styles. Either it's an all in one module that produces everything in a particular group (EX: Combinators and the stuff that goes with it), or tileable where production capacity is needed for one specific thing (EX: red circuit production).

Capture ...

An idea from a different angle, what about late game tutorials and blueprints?
EX: A tutorial for how to use blueprints as a remote control, and then give them a blueprint for a toggle and remote control.
EX: A tutorial for how to make a graph to show what's in the logistic network storage ...

You can use blueprints of combinators as a kind of remote control, So I made a bunch of combinator stuff to make blueprint remotes easy to use. I would like to see what everyone can do with this kind of set up.

First the Blueprint Remote (containing ON and OFF signals, all 9 colours, and all 5 ores ...

I created (and remixed other designs into) a digital number display and a letter display that is tileable and compact while being fairly simple to use. The ease of use was key here as I wanted to throw them EVERYWHERE :D

Included in the blueprint book is also an example blueprint showing a working ...

TL;DR
Adding weather in the game to add some variety to gameplay while being UPS friendly.

What ?
Every day, have a 1 in 20 chance of getting a 'weather event' which could be one of:
Rainy Day, solar panel output is halved and the screen is a bit darker
Blood Moon, a wave of biters spawn and ...

The ability to add a neighbour bonus to radars.
IE: arranging a couple radars next to each other, so that you can adjust the power draw and range based on the neighbour bonus.