Hey Sam!
Those are some awesome additions and improvements made by Libby! I remember now that I got stuck on the ESP32 port at that SD card library. I'm happy to test this, but it will have to wait, I just ordered 3 of those Lora TTgo boards and they'll take ~23days to arrive :/
But honestly, looking over the changes they all look reasonable to me. I would be happy to accept a pull request to the sudomesh esp32 branch. My main concern would be syncing up that old branch with some of the changes made to the main branch. I do see the routing header and cpp were added, which is a good start.
I'm glad to see someone iterating on our work! Admittedly, I've been an absentee maintainer of DR, but once I get those board I may revisit the routing portion to finish some of the ideas I started a year ago.
Thanks for the inspiration!
-grant/paidforby