It's working OK for me with my tests (I juste had to adjust a little bit my Godot components but it's nothing very complicated)
At first I was hoping to get a new spritesheet in the Action Pack under sprite sheets_1x1/character_x/srw_arpg_walk.png but what you did gives the same result and I guess those are different scripts you use for export for each pack
In conclusion, a big thank you for the update !