Only one thing: it would be really useful if the brush can have also dimensions of 2x2 and 3x3 pixels: I ofte work on very small sprites and the minimum brush dimension of 4x4 is too big.
This is now possible as of 2.0.1 by setting the pattern size increment to a value less than zero. For example, -2 will give you a 2x2 brush. That is unfortunately as small as it can go for now. Also note that the -1 increment will not tile the same way as even values.
