Red Scorpions are just a chapter I happen to have a personal liking for. And I don't want to do the typical, ultramarines, space wolves, dark angels or blood angels. Other chapters have terminators too and deserve a little love and attention. 

 But if people really *really* don't like the idea of playing as a Red Scorpion, the chapter can be changed. the RP doesn't hinge on them specifically. I don't suspect it would be a hard barrier, but if it is for people it would be helpful if they spoke up about it. If enough people do I can change it.