Ok, here goes, a couple of things.
1. Nice colurs scheme, clean and simple.
2. So the chapter is fighting Jack White? Cool! ^_^
3. They do seem to be up their necks in aliens, maybe drop one or two of them and focus on one building it up into a real rivalry. Right now it feels like too much of everything. I'm guessing your friends play chaos, eldar, tyranids and orcs right?
4. The Crimson Fists are in NO shape to create a splinter chapter. They are fairly well desimated as it is and are rebuilding the chapter. Not sure if this would work, maybe, but I personally doubt it.