I would love to see more utilization of the GPU, especially for the end process of color correction and tiled orthophoto generation.
I find that color correction dramatically improves my pixel-averaged orthoimagery, and outputting from PS as tiles, then generating a .vrt and exporting subsets with GDAL is the best workflow for ortho output that I have found (~60 sq km area, 10-15 cm pixel resolution, ~1000 images)