I was using sodium dust to get easy hydrogen for my petrochem infrastructure. I was getting it by centrifuging clay dust. After a bit, I realized that my AE2 storage drives were getting to full capacity very quickly. Yeah. I had 139k aluminium dust, 75k lithium dust, and 139k silicon. This was from centrifuging the clay dust, yielding these materials. I think that getting mass amounts of the EV material is an easy option the second you get an LV Macerator and an electrolyzer is a problem. Of course, you probably already know about this, but in case you don't, nerfing the yield of electrolysis of clay dust in the next update would make sense.

Cables were EV so I forgot that they were MV, but refining is still easy with a blast furnace, which I think is first obtained at LV

Seems reasonable to me :)
And, iirc, Aluminum is the MV material, so getting the raw in large quantities early on is a non-issue; the actual "expensive" part at that stage is the refining thereof.

Clay is intended to be the primary source of a variety of materials, including Aluminium. This is working as intended.

Nomi is designed to avoid situations where players are tormented by resource scarcity, like Nomicoins for buying ores you can't find in a reasonable timeframe due to inconvenient worldgen. The focus of the pack is automation, not RNG and waiting.

Resource scarcity of Indium is a problem then, if you are aiming to eliminate this problem. The intricate process required for indium doesn’t seem to match the way the rest of the pack works.