Disabling the hex grid reveals stray, grey pixels between tiles...I would really like to use this tool without the grid overlay. They also do show up in the final export. I would also really want the option to export as 'nearest neighbor' instead of with anti-aliasing. <- this was my error. The image preview on windows was anti-aliasing, not the export. Exports are pixel-perfect :)
Some resolution scaling would elevate this tool by a lot, like if I could set the pixel resolution of the hex base in case I wanted to make higher resolution tiles.
The usability is nearly there for me, but falls short in these areas.