Although D+ "Rebel Spy" Andor will likley have a few looks depending on the mission. I assume when at Rebel HQ the series will match the main Rogue One aesthetic and he'll have a look that somewhat closely matches his standard Rebel Officer look of Rogue One.
Although I'm not even sure this is set on Yavin, or how many years before Rogue One?
Maybe it's set on Dantoine, or an as yet revealed Rebel HQ, where the main Rebel uniforms might slightly change, as they do seem to adapt their main looks to their specific HQ.
I do hope when they do finally release a figure of Andor, his primary look is still close enough to display with the Rogue One cast as well.
Looks like Saw will return , apparently Stellan Skarsgård revealed in an interview that he filmed a scene alongside Whitaker.