Try this version of the mod:
http://www.mediafire.com/download/u3uz8tmcd0f3zu4/JourneyLoneWolf6.1.zip

All I did was recompile the mod with the current (v1.0.177) version of the game, which should hopefully fix any issues with the new companions. My belief is that because the mods with Story changes (such as this one) apparently store the entire Story goals of the Main Campaign in the Mods folder, they are overwriting the changes that Larian made with the DLC.

If the issue still persists, then there would have to be a conflict with the Story goals that this mod directly changes (and thus still uses the previous versions of):
_Start
_GLO_PlayerComments
_PROC
CYS_General
HOM_EndGame

I don't think the companions are mentioned in these files, but I might be mistaken since I haven't really looked too closely at the new files. I am concerned a little bit about the Co-Op dialog changes, but that shouldn't matter for this mod because Co-Op dialog is impossible anyways.