Though there's an option to allow palleting everything, that's leads to too many options in the crafting and other menus. Would be nice if there was an option to allow, in addition to intermediates, items used to construct science packs, like red and yellow bullets, electric miners, ...

hmmm I see, that might be interesting. Or how about a similar idea -- you can make a pallet that has enough ingredients to make 10x of "something". For example, a "green circuit pallet" would have 10x iron and 15x copper. So you can unload it, and then make 10x green chips! Would that be helpful?

An interesting idea... but like not something I'd use, at least in my current factory.

In my current factory, I have lots of 'mini-factories', each producing a set of goods (often just one) used in science production. For instance, I have a engine mini factory that produces engines, which I can pallet. I'd also thinking of palleting my various other mini-factory outputs. Though all are used in science production, some are not 'intermediate' products. Though some of these products I don't need to pallet as they are made at the mini-factories that consume them, such as yellow belts and yellow inserters. Others I have made in their own mini-factories, such as grenades and piercing magazines. The list of non-intermediate products consumed in science pack is fairly small, in addition the four above: pipe, magazines, gun turrets, miners, electric furnaces, and radar, for a total of 10 (unless I missed something).

As you do provide an option to pallet everything, I can implement my factory I as I want to. I was just hoping to avoid some crafting menu clutter.

So while I could see your idea possibly used in other factories, in mine it just would fit into my overall design.