This is exactly what I am doing this season. GTX boots just don’t last and full grain leather boots are heavier than hell. Not to mention neither of them breathe very well.
The hard part of this is finding a boot that DOESN’T have GTX. I ended up going with Salomon Quest 4D non-GTX in their Forces lineup (military version). It’s fairly light and all synthetic so it should dry quicker. If it’s really wet out, I can step into the GTX socks. When it’s dry, I’ll save the wear and tear on the GTX membrane when I don’t need them.
This is still a “concept” for me but hopefully I’ll have some actual use with this system after this season.