Im going against that and saying the main use for clay which is bricks should be use more as a building material but because clay is so hard to find it is being replaced by cobble which looks awful especialy when entire towns are made out of the same dull grey stone.Best solution is just to assume FlowerChild is smarter than you. If your idea seems obvious to you, Flower has already thought of it and either dismissed it or it's in the works.
I think altering the map generater to include more clay would would be more realistic as clay is found almost every where and has been used as a building material thousands of years.
If it was thought neccesary you could change the crafting recipe to possibly:
B B B - - - B=Bricks
B B B - - - Because 3x3 is the usualy formation for recipes making a block out of 1
B B B - - - Material.
or
B B B - - - 0=Air
B 0 B - - - Because it uses exactly twice as many bricks as before and...
B B B - - - bricks have holes in them?
also I think to be more efficient placing a raw clay block into the kiln or maybe into the crucible could turn it straight into a brick block saving clay and fuel.