So far, the "mod" is working fine for me. I have to use the original auto-save at the end of every session, dismiss all companions at camp before a long rest, fast travel back to camp to reacquire them after long rest, and only load the original auto-save if I have more than a 4 person party at the time; but whatever ...
Main Character: Criminal, Custom Drow, Divine Soul Sorcerer. Custom Companion: Outlander, Custom Lineage (Human), Hunter STRanger. Custom Companion: Folk Hero, Wood Elf, Land Druid (Artic). Origin Companions: Shadowheart, Lae'zel (Battlemaster), and Wyll.