Testing out your mod on my new game and I found 1 error and its solution.Keep me updated.
As for me as soon as I either do a Rollback or Back or click to finish all the text on the screen then Ren'Py errors out.
In game/scripts/lobby_script.rpy
Line 799 has {/color}{/color} which threw an exception for closing an unopened dialogue.
Remove one of those fixed it. I can now talk to Emma or Felicity in the lobby.
Also, I see the quicksave and quickload options are gone... Not sure why but I miss using those. If it's due to the walkthrough button being added, I don't feel that's needed at all times like the save/load buttons are.