It'd be nice to have another mining group, although I'd suggest that BMM needs love just now (with DHC doing well). Of course, it'd also be good not to be the pirate group that Kruger supposedly descended into before disbandment.
It is up to you about how cooperative you are with Daumann, but my impression has been that you both like each other more than IMG Personally I've seen enough squabbling between Rheinland factions already...
Of course, what makes a faction interesting can be the roleplay it has with those around it. Perhaps make a deal with the Unioners to out-compete Repex, and maybe the Hogosha (and Farmers?) to pressure the GMG in S-13 - stuff like that.
As Asbestos said, a slightly higher bonus (2x is the 'stealing' bonus that IMG has on Uncut Diamonds).