Thanks; it's good to get other people's perspectives.
On the argument that you can have a bank of forges running in parallel and make bricks without tying up your backpack, the same could be said for cobblestone, using a bank of workbenches.
On the argument that bricks offer an aesthetic alternative, all the brick textures have long been available to paint on whatever block you want.
On the argument that clay beats stone on acquisition time, I did another test. I had no skill points spent, and used an unmodded steel shovel and pickaxe.
One, 250 HP dirt block yielded 22 units of clay soil.
One, 500 HP stone block yielded 55 units of small stone.
That's 0.11 units of product for each 1 HP of damage in both cases. The clay yield per unit of HP is even worse for ground (the topsoil that's embedded with plant fibers) and sand. Also, dirt is not available in the desert, while stone is available in all biomes. So, other than having to dig through a few dirt blocks to reach the stone, if anything stone has the edge over clay in acquisition time.
On AlbasterW's argument that bricks provide more
instant HP without the need to upgrade... well that's true, but that convenience comes at the cost of over four times as long to make the brick block in the first place.
TL;DR: fix bricks, Gazz!