hi @Sacredanarchy! I am sorry to reply so late but I left the modding of factorio when 2.0 dropped and didn't really returned since. First I just want to thank you for your beautiful work on the original assets! I only wish I was as talented as you with the graphics.
To answer your question shortly: No :(
Long answer is, of course there is a way to update the graphics but is has to be done manually. The assets as you already mentioned are packed into this mod, so they have to be updated inside. I faintly remember that is renamed some of them and I think I might have done some minor modifications of the soviet tesla coil as well.
But, please don't let this stop you from progressing with your own work!