The 21w05b snapshot solved a problem with the name of the copper block and his variants, but it still wrong, they only added the word "block" on the waxed copper block, but on the oxidized variants, the don't, and that's a problem, because, we have the copper block, ok, but then, we have the exposed copper, not the exposed copper block, it can perfectly be a ingot, a gem, a block, or anything else. The same happens with the weathered copper and the oxidized copper.

Other example are the slabs and stairs, the are called "Cut copper stairs" for something, and it's because they are stairs, the some for the "Cut copper slabs".