It would be great to be able to work with other then jpg texture files, for example 16bit Tif files or PSB files.
So one can do larger then 30k textures and not limited to 8bit. As long as input images are of course 16bit tif files.
Layered texture file would be very handy as well, where one could go in and manually edit seams that Photoscan might have some trouble with in Photoshop for example.