i would like to add that webbing and rope interface is subject to friction and increased wear at the contact point.( more so than either in contact with the metal of biner.) probably not a big problem but worth considereing
yes, and i'd be more concerned about the polyester webbing, the dyneema is highly cut-resistent (alot more than polyester or nylon or polypro) i'd watch that spot on the webbing closely. in general rope directly to webbing is probably a bad idea. someone mentioned dyneema cord to dyneema cord being ok recently, and that "might" be true considering the cut resistence of dyneema, but the webbing isn't going to be nearly as cut resistent so i'd definately keep an eye on the point of contact (on the webbing in particular).