sorry, one last thing. It would be possible to apply noise in the gap, but not within its texture but rather the distortion of the gap itself, just as happens in 3dsmax tile. It is useful for making rough gaps that have diferent thickness maybe because the tile deformation of an old wood for example, or such as the gaps between the formwork concrete plates.
In the same way as 3dsmax tile, the option to disable some random tile, as if the brick had fallen from the wall, would also be useful. Now I think that's all!