Making copper pipes sounds not-gamebreaking. I'd go for 3 copper plates for 2 pipes, to make them less incentivized than iron pipes.
Might as well make iron wire too, but this is more just a thing i remember being in satisfactory, haha. 3 iron plates into 2 "copper" cables sounds fair.
Maybe too skippy, but I've never liked that you need to make yellow undergrounds and splitters to get the higher tier ones, so it'd be nice to have recipes that use the transport belts of that tier, rather than the previous. So some red belts + some iron plates = red underground. And red belts + green circuits + iron plates = red splitter. You could make these recipes slower than the upgrade versions, since making something new is harder, or something. Total resource cost could be higher since it's a simpler chain. There's already the steel and plastic belt alternatives, so maybe this would clutter the belts group too much...
I'd like to see vehicles into science packs recipes. It's called logistics science so clearly it should be made from a locomotive, cargo wagon and some train tracks! Chem science would be car, some solid fuel, maybe concrete for road? Military science would be tank and some shells.
Spidertron could be utility? or combination of military and utility output, could be a fun kind of annoying if they're output at unequal amounts.
You tend to make very few vehicles in a run, so a production line for them would be something pretty new.
There's plenty of science pack alts, but i think every machine should have a route to be turned into science, so you don't have to void them once they're obsolete. Burner miners don't have a sink, perhaps you could reuse the drill bit they have to turn them into electric miners at a discount. Turn a steel furnace into an electric arc furnace by adding a carbon (coal) electrode and some circuitry.
You could turn uranium fuel cells into a bunch of batteries by adding some green circuits. Another kind of battery could be a sulfuric acid barrel that you put copper and iron plates into (no barrel refund) you could even make them outside a chemplant!
The internal electricity buffer, giving vision, and transmitting power to nearby robots suggests roboports are made of batteries, radar and a substation.
I really enjoy this mod! I have been playing Cheap Mode so perhaps i'm not living the Intended experience, but trying to make production chains while avoiding the vanilla recipes is fun.

Making copper pipes sounds not-gamebreaking. I'd go for 3 copper plates for 2 pipes, to make them less incentivized than iron pipes.

While the recipe sounds nice, the graphics would not line up, unfortunately. :(

Maybe too skippy, but I've never liked that you need to make yellow undergrounds and splitters to get the higher tier ones, so it'd be nice to have recipes that use the transport belts of that tier, rather than the previous.

I hope you don't mind me stealing this idea and making it a seperate mod instead. (It will be compatible with vanilla Galore and change the recipes, together with, of course, the vanilla ones.)

I'd like to see vehicles into science packs recipes.

Will be implemented as fast as possible, I like this idea :D
(Same for "upgrade building" recipes you've listed below.)

You could turn uranium fuel cells into a bunch of batteries by adding some green circuits.

Will be added in the "convoluted" recipe group. It may be a bit too far from vanilla to be included in the default selection.

Another kind of battery could be a sulfuric acid barrel that you put copper and iron plates into (no barrel refund) you could even make them outside a chemplant!

This one seems kinda funny, will be added to the "silly" recipe group. (I should really give the recipe groups nicer names...)

The internal electricity buffer, giving vision, and transmitting power to nearby robots suggests roboports are made of batteries, radar and a substation.

Will also be implemented as fast as possible. They make a lot of sense.

I really enjoy this mod! I have been playing Cheap Mode so perhaps i'm not living the Intended experience, but trying to make production chains while avoiding the vanilla recipes is fun.

Thanks for the kind words, and of course, thanks for the suggestions! (´∀`)b