It looks like you are on the right track with your research, but the best research is to DEMO if you can! If you are worried that the Mothership may be a bit too stiff/directional for you, take a peek at the Jones Twin Sister. Another company to look into would be Rossignol; the Diva and Frenemy might appeal to you as well.
The NS Raven looks pretty good for your type of riding, but if you haven't ridden a hybrid ROCKER before, it will be a drastic change from what you are used to (maybe in a good way, maybe in a bad way), it all depends what you like! I think if you arent interested in extreme steeps or groomers unless necessary, you could also consider sizing down a touch(not going to ask, but depending on your weight), something btw 150-154 (especially in the trees) would be plenty of snowboard as the hybrid boards offer more float.
Good luck searching!